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class="vector-toc-list"> </ul> </li> <li id="toc-Dyfeisiadau_pellach" class="vector-toc-list-item vector-toc-level-1 vector-toc-list-item-expanded"> <a class="vector-toc-link" href="#Dyfeisiadau_pellach"> <div class="vector-toc-text"> <span class="vector-toc-numb">3</span> <span>Dyfeisiadau pellach</span> </div> </a> <ul id="toc-Dyfeisiadau_pellach-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-Bywyd_personol" class="vector-toc-list-item vector-toc-level-1 vector-toc-list-item-expanded"> <a class="vector-toc-link" href="#Bywyd_personol"> <div class="vector-toc-text"> <span class="vector-toc-numb">4</span> <span>Bywyd personol</span> </div> </a> <ul id="toc-Bywyd_personol-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-Cyfeiriadau" class="vector-toc-list-item vector-toc-level-1 vector-toc-list-item-expanded"> <a class="vector-toc-link" href="#Cyfeiriadau"> <div class="vector-toc-text"> <span class="vector-toc-numb">5</span> <span>Cyfeiriadau</span> </div> </a> <ul id="toc-Cyfeiriadau-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-Dolenni_allanol" class="vector-toc-list-item vector-toc-level-1 vector-toc-list-item-expanded"> <a class="vector-toc-link" href="#Dolenni_allanol"> <div class="vector-toc-text"> <span class="vector-toc-numb">6</span> <span>Dolenni allanol</span> </div> </a> <ul id="toc-Dolenni_allanol-sublist" class="vector-toc-list"> </ul> </li> </ul> </div> </div> </nav> </div> </div> <div class="mw-content-container"> <main id="content" class="mw-body"> <header class="mw-body-header vector-page-titlebar"> <nav aria-label="Cynnwys" class="vector-toc-landmark"> <div id="vector-page-titlebar-toc" class="vector-dropdown vector-page-titlebar-toc vector-button-flush-left" title="Tabl Cynnwys" > <input type="checkbox" id="vector-page-titlebar-toc-checkbox" role="button" aria-haspopup="true" data-event-name="ui.dropdown-vector-page-titlebar-toc" class="vector-dropdown-checkbox " aria-label="Toglo'r tabl cynnwys" > <label id="vector-page-titlebar-toc-label" for="vector-page-titlebar-toc-checkbox" class="vector-dropdown-label cdx-button cdx-button--fake-button cdx-button--fake-button--enabled cdx-button--weight-quiet cdx-button--icon-only " aria-hidden="true" ><span class="vector-icon mw-ui-icon-listBullet mw-ui-icon-wikimedia-listBullet"></span> <span class="vector-dropdown-label-text">Toglo'r tabl cynnwys</span> </label> <div class="vector-dropdown-content"> <div id="vector-page-titlebar-toc-unpinned-container" class="vector-unpinned-container"> </div> </div> </div> </nav> <h1 id="firstHeading" class="firstHeading mw-first-heading"><span class="mw-page-title-main">Harry Grindell Matthews</span></h1> <div id="p-lang-btn" class="vector-dropdown mw-portlet mw-portlet-lang" > <input type="checkbox" id="p-lang-btn-checkbox" role="button" aria-haspopup="true" data-event-name="ui.dropdown-p-lang-btn" class="vector-dropdown-checkbox mw-interlanguage-selector" aria-label="Ewch i erthygl mewn iaith arall. Ar gael mewn 3 iaith" > <label id="p-lang-btn-label" for="p-lang-btn-checkbox" class="vector-dropdown-label cdx-button cdx-button--fake-button cdx-button--fake-button--enabled cdx-button--weight-quiet cdx-button--action-progressive mw-portlet-lang-heading-3" aria-hidden="true" ><span class="vector-icon mw-ui-icon-language-progressive mw-ui-icon-wikimedia-language-progressive"></span> <span class="vector-dropdown-label-text">3 iaith</span> </label> <div class="vector-dropdown-content"> <div class="vector-menu-content"> <ul class="vector-menu-content-list"> <li class="interlanguage-link interwiki-ar mw-list-item"><a href="https://ar.wikipedia.org/wiki/%D9%87%D8%A7%D8%B1%D9%8A_%D8%BA%D8%B1%D9%8A%D9%86%D8%AF%D9%8A%D9%84_%D9%85%D8%A7%D8%AB%D9%8A%D9%88%D8%B2" title="هاري غرينديل ماثيوز - Arabeg" lang="ar" hreflang="ar" data-title="هاري غرينديل ماثيوز" data-language-autonym="العربية" data-language-local-name="Arabeg" class="interlanguage-link-target"><span>العربية</span></a></li><li class="interlanguage-link interwiki-en mw-list-item"><a href="https://en.wikipedia.org/wiki/Harry_Grindell_Matthews" title="Harry Grindell Matthews - Saesneg" lang="en" hreflang="en" data-title="Harry Grindell Matthews" data-language-autonym="English" data-language-local-name="Saesneg" class="interlanguage-link-target"><span>English</span></a></li><li class="interlanguage-link interwiki-sv mw-list-item"><a href="https://sv.wikipedia.org/wiki/Harry_Grindell_Matthews" title="Harry Grindell Matthews - Swedeg" lang="sv" hreflang="sv" data-title="Harry Grindell Matthews" data-language-autonym="Svenska" data-language-local-name="Swedeg" class="interlanguage-link-target"><span>Svenska</span></a></li> </ul> <div class="after-portlet after-portlet-lang"><span class="wb-langlinks-edit wb-langlinks-link"><a href="https://www.wikidata.org/wiki/Special:EntityPage/Q5669310#sitelinks-wikipedia" title="Golygu dolenni rhyngwici" class="wbc-editpage">Golygu dolenni</a></span></div> </div> </div> </div> </header> <div class="vector-page-toolbar"> <div class="vector-page-toolbar-container"> <div id="left-navigation"> <nav aria-label="Parthau"> <div id="p-associated-pages" class="vector-menu vector-menu-tabs mw-portlet mw-portlet-associated-pages" > <div class="vector-menu-content"> <ul class="vector-menu-content-list"> <li id="ca-nstab-main" class="selected vector-tab-noicon mw-list-item"><a href="/wiki/Harry_Grindell_Matthews" title="Gweld y dudalen bwnc [c]" accesskey="c"><span>Erthygl</span></a></li><li id="ca-talk" class="new vector-tab-noicon mw-list-item"><a href="/w/index.php?title=Sgwrs:Harry_Grindell_Matthews&action=edit&redlink=1" rel="discussion" class="new" title="Sgwrsio am y dudalen (nid yw'r dudalen yn bodoli) [t]" accesskey="t"><span>Sgwrs</span></a></li> </ul> </div> </div> <div id="vector-variants-dropdown" class="vector-dropdown emptyPortlet" > <input type="checkbox" id="vector-variants-dropdown-checkbox" role="button" aria-haspopup="true" data-event-name="ui.dropdown-vector-variants-dropdown" class="vector-dropdown-checkbox " aria-label="Newid amrywiad iaith" > <label id="vector-variants-dropdown-label" for="vector-variants-dropdown-checkbox" class="vector-dropdown-label cdx-button cdx-button--fake-button cdx-button--fake-button--enabled cdx-button--weight-quiet" aria-hidden="true" ><span class="vector-dropdown-label-text">Cymraeg</span> </label> <div class="vector-dropdown-content"> <div id="p-variants" class="vector-menu mw-portlet mw-portlet-variants emptyPortlet" > <div class="vector-menu-content"> <ul class="vector-menu-content-list"> </ul> </div> </div> </div> </div> </nav> </div> <div id="right-navigation" class="vector-collapsible"> <nav aria-label="Golygon"> <div id="p-views" class="vector-menu vector-menu-tabs mw-portlet mw-portlet-views" > <div class="vector-menu-content"> <ul class="vector-menu-content-list"> <li id="ca-view" class="selected vector-tab-noicon mw-list-item"><a href="/wiki/Harry_Grindell_Matthews"><span>Darllen</span></a></li><li id="ca-ve-edit" class="vector-tab-noicon mw-list-item"><a href="/w/index.php?title=Harry_Grindell_Matthews&veaction=edit" title="Golygu'r dudalen hon [v]" accesskey="v"><span>Golygu</span></a></li><li id="ca-edit" class="collapsible vector-tab-noicon mw-list-item"><a href="/w/index.php?title=Harry_Grindell_Matthews&action=edit" title="Golygu cod ffynhonnell y dudalen hon [e]" accesskey="e"><span>Golygu cod</span></a></li><li id="ca-history" class="vector-tab-noicon mw-list-item"><a href="/w/index.php?title=Harry_Grindell_Matthews&action=history" title="Fersiynau cynt o'r dudalen hon. [h]" accesskey="h"><span>Gweld hanes</span></a></li> </ul> </div> </div> </nav> <nav class="vector-page-tools-landmark" aria-label="Offer tudalen"> <div id="vector-page-tools-dropdown" class="vector-dropdown vector-page-tools-dropdown" > <input type="checkbox" id="vector-page-tools-dropdown-checkbox" role="button" aria-haspopup="true" data-event-name="ui.dropdown-vector-page-tools-dropdown" class="vector-dropdown-checkbox " aria-label="Blwch offer" > <label id="vector-page-tools-dropdown-label" for="vector-page-tools-dropdown-checkbox" class="vector-dropdown-label cdx-button cdx-button--fake-button cdx-button--fake-button--enabled cdx-button--weight-quiet" aria-hidden="true" ><span class="vector-dropdown-label-text">Blwch offer</span> </label> <div class="vector-dropdown-content"> <div id="vector-page-tools-unpinned-container" class="vector-unpinned-container"> <div id="vector-page-tools" class="vector-page-tools vector-pinnable-element"> <div class="vector-pinnable-header vector-page-tools-pinnable-header vector-pinnable-header-unpinned" data-feature-name="page-tools-pinned" data-pinnable-element-id="vector-page-tools" data-pinned-container-id="vector-page-tools-pinned-container" data-unpinned-container-id="vector-page-tools-unpinned-container" > <div class="vector-pinnable-header-label">Blwch offer</div> <button class="vector-pinnable-header-toggle-button vector-pinnable-header-pin-button" data-event-name="pinnable-header.vector-page-tools.pin">symud i'r bar ochr</button> <button class="vector-pinnable-header-toggle-button vector-pinnable-header-unpin-button" data-event-name="pinnable-header.vector-page-tools.unpin">cuddio</button> </div> <div id="p-cactions" class="vector-menu mw-portlet mw-portlet-cactions emptyPortlet vector-has-collapsible-items" title="Rhagor o opsiynau" > <div class="vector-menu-heading"> Gweithredoedd </div> <div class="vector-menu-content"> <ul class="vector-menu-content-list"> <li id="ca-more-view" class="selected 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class="mw-list-item"><a href="/wiki/Arbennig:WhatLinksHere/Harry_Grindell_Matthews" title="Rhestr o bob tudalen sy'n cysylltu â hon [j]" accesskey="j"><span>Beth sy'n cysylltu yma</span></a></li><li id="t-recentchangeslinked" class="mw-list-item"><a href="/wiki/Arbennig:RecentChangesLinked/Harry_Grindell_Matthews" rel="nofollow" title="Newidiadau diweddar i dudalennau sydd yn cysylltu â hon [k]" accesskey="k"><span>Newidiadau perthnasol</span></a></li><li id="t-permalink" class="mw-list-item"><a href="/w/index.php?title=Harry_Grindell_Matthews&oldid=13466372" title="Dolen barhaol i'r fersiwn hwn y dudalen hon"><span>Dolen barhaol</span></a></li><li id="t-info" class="mw-list-item"><a href="/w/index.php?title=Harry_Grindell_Matthews&action=info" title="Mwy o wybodaeth am y dudalen hon"><span>Gwybodaeth am y dudalen</span></a></li><li id="t-cite" class="mw-list-item"><a href="/w/index.php?title=Arbennig:CiteThisPage&page=Harry_Grindell_Matthews&id=13466372&wpFormIdentifier=titleform" title="Gwybodaeth ar sut i gyfeirio at y dudalen hon"><span>Cyfeirio at y dudalen hon</span></a></li><li id="t-urlshortener" class="mw-list-item"><a href="/w/index.php?title=Arbennig:UrlShortener&url=https%3A%2F%2Fcy.wikipedia.org%2Fwiki%2FHarry_Grindell_Matthews"><span>Cael URL byr</span></a></li><li id="t-urlshortener-qrcode" class="mw-list-item"><a href="/w/index.php?title=Arbennig:QrCode&url=https%3A%2F%2Fcy.wikipedia.org%2Fwiki%2FHarry_Grindell_Matthews"><span>Lawrlwytho cod QR</span></a></li> </ul> </div> </div> <div id="p-coll-print_export" class="vector-menu mw-portlet mw-portlet-coll-print_export" > <div class="vector-menu-heading"> Argraffu / allforio </div> <div class="vector-menu-content"> <ul class="vector-menu-content-list"> <li id="coll-create_a_book" class="mw-list-item"><a href="/w/index.php?title=Arbennig:Book&bookcmd=book_creator&referer=Harry+Grindell+Matthews"><span>Llunio llyfr</span></a></li><li id="coll-download-as-rl" class="mw-list-item"><a href="/w/index.php?title=Arbennig:DownloadAsPdf&page=Harry_Grindell_Matthews&action=show-download-screen"><span>Lawrlwytho fel PDF</span></a></li><li id="t-print" class="mw-list-item"><a href="/w/index.php?title=Harry_Grindell_Matthews&printable=yes" title="Cynhyrchwch fersiwn o'r dudalen yn barod at ei hargraffu [p]" accesskey="p"><span>Fersiwn argraffu</span></a></li> </ul> </div> </div> <div id="p-wikibase-otherprojects" class="vector-menu mw-portlet mw-portlet-wikibase-otherprojects" > <div class="vector-menu-heading"> Mewn prosiectau eraill </div> <div class="vector-menu-content"> <ul class="vector-menu-content-list"> <li class="wb-otherproject-link wb-otherproject-commons mw-list-item"><a href="https://commons.wikimedia.org/wiki/Category:Harry_Grindell_Matthews" hreflang="en"><span>Comin Wikimedia</span></a></li><li id="t-wikibase" class="wb-otherproject-link wb-otherproject-wikibase-dataitem mw-list-item"><a href="https://www.wikidata.org/wiki/Special:EntityPage/Q5669310" title="Cysylltu i eitem ystorfa gysylltiedig [g]" accesskey="g"><span>Eitem Wicidata</span></a></li> </ul> </div> </div> </div> </div> </div> </div> </nav> </div> </div> </div> <div class="vector-column-end"> <div class="vector-sticky-pinned-container"> <nav class="vector-page-tools-landmark" aria-label="Offer tudalen"> <div id="vector-page-tools-pinned-container" class="vector-pinned-container"> </div> </nav> <nav class="vector-appearance-landmark" aria-label="Gwedd"> <div id="vector-appearance-pinned-container" class="vector-pinned-container"> <div id="vector-appearance" class="vector-appearance vector-pinnable-element"> <div class="vector-pinnable-header vector-appearance-pinnable-header vector-pinnable-header-pinned" data-feature-name="appearance-pinned" data-pinnable-element-id="vector-appearance" data-pinned-container-id="vector-appearance-pinned-container" data-unpinned-container-id="vector-appearance-unpinned-container" > <div class="vector-pinnable-header-label">Gwedd</div> <button class="vector-pinnable-header-toggle-button vector-pinnable-header-pin-button" data-event-name="pinnable-header.vector-appearance.pin">symud i'r bar ochr</button> <button class="vector-pinnable-header-toggle-button vector-pinnable-header-unpin-button" data-event-name="pinnable-header.vector-appearance.unpin">cuddio</button> </div> </div> </div> </nav> </div> </div> <div id="bodyContent" class="vector-body" aria-labelledby="firstHeading" data-mw-ve-target-container> <div class="vector-body-before-content"> <div class="mw-indicators"> </div> <div id="siteSub" class="noprint">Oddi ar Wicipedia</div> </div> <div id="contentSub"><div id="mw-content-subtitle"></div></div> <div id="mw-content-text" class="mw-body-content"><div class="mw-content-ltr mw-parser-output" lang="cy" dir="ltr"><table class="infobox biography vcard" style="width:22em"><tbody><tr><th colspan="2" style="text-align:center;font-size:125%;font-weight:bold"><span class="fn">Harry Grindell Matthews</span></th></tr><tr><td colspan="2" style="text-align:center"><span class="mw-default-size" typeof="mw:File/Frameless"><a href="/wiki/Delwedd:Harry_Grindell_Matthews_1924.jpg" class="mw-file-description"><img src="//upload.wikimedia.org/wikipedia/commons/thumb/2/26/Harry_Grindell_Matthews_1924.jpg/220px-Harry_Grindell_Matthews_1924.jpg" decoding="async" width="220" height="273" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/2/26/Harry_Grindell_Matthews_1924.jpg/330px-Harry_Grindell_Matthews_1924.jpg 1.5x, //upload.wikimedia.org/wikipedia/commons/2/26/Harry_Grindell_Matthews_1924.jpg 2x" data-file-width="383" data-file-height="476" /></a></span></td></tr><tr><th scope="row">Ganwyd</th><td>17 Mawrth 1880 <span class="penicon autoconfirmed-show"><span class="mw-valign-text-top" typeof="mw:File/Frameless"><a href="https://www.wikidata.org/wiki/Q5669310?uselang=cy#P569" title="Edit this on Wikidata"><img alt="Edit this on Wikidata" src="//upload.wikimedia.org/wikipedia/commons/thumb/8/8a/OOjs_UI_icon_edit-ltr-progressive.svg/10px-OOjs_UI_icon_edit-ltr-progressive.svg.png" decoding="async" width="10" height="10" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/8/8a/OOjs_UI_icon_edit-ltr-progressive.svg/15px-OOjs_UI_icon_edit-ltr-progressive.svg.png 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/8/8a/OOjs_UI_icon_edit-ltr-progressive.svg/20px-OOjs_UI_icon_edit-ltr-progressive.svg.png 2x" data-file-width="20" data-file-height="20" /></a></span></span><br /><span class="birthplace">Winterbourne <span class="penicon autoconfirmed-show"><span class="mw-valign-text-top" typeof="mw:File/Frameless"><a href="https://www.wikidata.org/wiki/Q5669310?uselang=cy#P19" title="Edit this on Wikidata"><img alt="Edit this on Wikidata" src="//upload.wikimedia.org/wikipedia/commons/thumb/8/8a/OOjs_UI_icon_edit-ltr-progressive.svg/10px-OOjs_UI_icon_edit-ltr-progressive.svg.png" decoding="async" width="10" height="10" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/8/8a/OOjs_UI_icon_edit-ltr-progressive.svg/15px-OOjs_UI_icon_edit-ltr-progressive.svg.png 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/8/8a/OOjs_UI_icon_edit-ltr-progressive.svg/20px-OOjs_UI_icon_edit-ltr-progressive.svg.png 2x" data-file-width="20" data-file-height="20" /></a></span></span></span></td></tr><tr><th scope="row">Bu farw</th><td>11 Medi 1941 <span class="penicon autoconfirmed-show"><span class="mw-valign-text-top" typeof="mw:File/Frameless"><a href="https://www.wikidata.org/wiki/Q5669310?uselang=cy#P570" title="Edit this on Wikidata"><img alt="Edit this on Wikidata" src="//upload.wikimedia.org/wikipedia/commons/thumb/8/8a/OOjs_UI_icon_edit-ltr-progressive.svg/10px-OOjs_UI_icon_edit-ltr-progressive.svg.png" decoding="async" width="10" height="10" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/8/8a/OOjs_UI_icon_edit-ltr-progressive.svg/15px-OOjs_UI_icon_edit-ltr-progressive.svg.png 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/8/8a/OOjs_UI_icon_edit-ltr-progressive.svg/20px-OOjs_UI_icon_edit-ltr-progressive.svg.png 2x" data-file-width="20" data-file-height="20" /></a></span></span><br /><span class="deathplace"><a href="/wiki/Abertawe" title="Abertawe">Abertawe</a> <span class="penicon autoconfirmed-show"><span class="mw-valign-text-top" typeof="mw:File/Frameless"><a href="https://www.wikidata.org/wiki/Q5669310?uselang=cy#P20" title="Edit this on Wikidata"><img alt="Edit this on Wikidata" src="//upload.wikimedia.org/wikipedia/commons/thumb/8/8a/OOjs_UI_icon_edit-ltr-progressive.svg/10px-OOjs_UI_icon_edit-ltr-progressive.svg.png" decoding="async" width="10" height="10" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/8/8a/OOjs_UI_icon_edit-ltr-progressive.svg/15px-OOjs_UI_icon_edit-ltr-progressive.svg.png 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/8/8a/OOjs_UI_icon_edit-ltr-progressive.svg/20px-OOjs_UI_icon_edit-ltr-progressive.svg.png 2x" data-file-width="20" data-file-height="20" /></a></span></span></span></td></tr><tr><th scope="row">Dinasyddiaeth</th><td class="category"><span typeof="mw:File"><a href="/wiki/Delwedd:Flag_of_Wales.svg" class="mw-file-description" title="Baner Cymru"><img alt="Baner Cymru" src="//upload.wikimedia.org/wikipedia/commons/thumb/d/dc/Flag_of_Wales.svg/22px-Flag_of_Wales.svg.png" decoding="async" width="22" height="13" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/d/dc/Flag_of_Wales.svg/33px-Flag_of_Wales.svg.png 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/d/dc/Flag_of_Wales.svg/44px-Flag_of_Wales.svg.png 2x" data-file-width="800" data-file-height="480" /></a></span> <a href="/wiki/Cymru" title="Cymru">Cymru</a> <span typeof="mw:File"><a href="/wiki/Delwedd:Flag_of_England.svg" class="mw-file-description" title="Baner Lloegr"><img alt="Baner Lloegr" src="//upload.wikimedia.org/wikipedia/commons/thumb/b/be/Flag_of_England.svg/22px-Flag_of_England.svg.png" decoding="async" width="22" height="13" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/b/be/Flag_of_England.svg/33px-Flag_of_England.svg.png 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/b/be/Flag_of_England.svg/44px-Flag_of_England.svg.png 2x" data-file-width="800" data-file-height="480" /></a></span> <a href="/wiki/Lloegr" title="Lloegr">Lloegr</a></td></tr><tr><th scope="row">Galwedigaeth</th><td>gwyddonydd <span class="penicon autoconfirmed-show"><span class="mw-valign-text-top" typeof="mw:File/Frameless"><a href="https://www.wikidata.org/wiki/Q5669310?uselang=cy#P106" title="Edit this on Wikidata"><img alt="Edit this on Wikidata" src="//upload.wikimedia.org/wikipedia/commons/thumb/8/8a/OOjs_UI_icon_edit-ltr-progressive.svg/10px-OOjs_UI_icon_edit-ltr-progressive.svg.png" decoding="async" width="10" height="10" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/8/8a/OOjs_UI_icon_edit-ltr-progressive.svg/15px-OOjs_UI_icon_edit-ltr-progressive.svg.png 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/8/8a/OOjs_UI_icon_edit-ltr-progressive.svg/20px-OOjs_UI_icon_edit-ltr-progressive.svg.png 2x" data-file-width="20" data-file-height="20" /></a></span></span></td></tr><tr><th scope="row">Priod</th><td>Ganna Walska <span class="penicon autoconfirmed-show"><span class="mw-valign-text-top" typeof="mw:File/Frameless"><a href="https://www.wikidata.org/wiki/Q5669310?uselang=cy#P26" title="Edit this on Wikidata"><img alt="Edit this on Wikidata" src="//upload.wikimedia.org/wikipedia/commons/thumb/8/8a/OOjs_UI_icon_edit-ltr-progressive.svg/10px-OOjs_UI_icon_edit-ltr-progressive.svg.png" decoding="async" width="10" height="10" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/8/8a/OOjs_UI_icon_edit-ltr-progressive.svg/15px-OOjs_UI_icon_edit-ltr-progressive.svg.png 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/8/8a/OOjs_UI_icon_edit-ltr-progressive.svg/20px-OOjs_UI_icon_edit-ltr-progressive.svg.png 2x" data-file-width="20" data-file-height="20" /></a></span></span></td></tr></tbody></table> <p>Dyfeisiwr o Loegr oedd <b>Harry Grindell Matthews</b> (<a href="/wiki/17_Mawrth" title="17 Mawrth">17 Mawrth</a> <a href="/wiki/1880" title="1880">1880</a> – <a href="/wiki/11_Medi" title="11 Medi">11 Medi</a> <a href="/wiki/1941" title="1941">1941</a>) a honnodd iddo ddyfeisio pelydr marwolaeth yn y 1920au.<sup id="cite_ref-1" class="reference"><a href="#cite_note-1"><span class="cite-bracket">[</span>1<span class="cite-bracket">]</span></a></sup> Ym 1934 symudodd i Tor Clawdd ar Fynydd y Gwair ger Abertawe.<sup id="cite_ref-2" class="reference"><a href="#cite_note-2"><span class="cite-bracket">[</span>2<span class="cite-bracket">]</span></a></sup> </p> <meta property="mw:PageProp/toc" /> <div class="mw-heading mw-heading2"><h2 id="Bywyd_cynnar_a_dyfeisiadau">Bywyd cynnar a dyfeisiadau</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Harry_Grindell_Matthews&veaction=edit&section=1" title="Golygu'r adran: Bywyd cynnar a dyfeisiadau" class="mw-editsection-visualeditor"><span>golygu</span></a><span class="mw-editsection-divider"> | </span><a href="/w/index.php?title=Harry_Grindell_Matthews&action=edit&section=1" title="Edit section's source code: Bywyd cynnar a dyfeisiadau"><span>golygu cod</span></a><span class="mw-editsection-bracket">]</span></span></div> <p>Ganed Harry Grindell Matthews ar 17 Mawrth 1880 yn Winterbourne, Swydd Gaerloyw, yn fab i'r ffermwr Daniel Matthews. Astudiodd Matthews yn Ysgol y Merchant Venturers ym Mryste a daeth yn beiriannydd electronig. Yn ystod <a href="/wiki/Ail_Ryfel_y_Boer" title="Ail Ryfel y Boer">Ail Ryfel y Boer</a>, gwasanaethodd Matthews yn Heddlu De Affrica a chafodd ei glwyfo ddwywaith.<sup id="cite_ref-3" class="reference"><a href="#cite_note-3"><span class="cite-bracket">[</span>3<span class="cite-bracket">]</span></a></sup> </p><p>Ym 1911, honnodd Matthews ei fod wedi dyfeisio dyfais Aerophone, ffôn radio, ac wedi trosglwyddo negeseuon rhwng gorsaf ddaear ac awyren o bellter o 2 milltir (3.2 km). Denodd ei arbrofion sylw'r llywodraeth, ac ar 4 Gorffennaf 1912 ymwelodd Matthews <a href="/wiki/Palas_Buckingham" title="Palas Buckingham">â Phalas Buckingham</a>. Fodd bynnag, pan ofynnodd Morlys Prydain am arddangosiad o'r Aerophone, mynnodd Matthews nad oedd unrhyw arbenigwyr yn bresennol yn y lleoliad. Pan ddatgymalwyd rhan o'r cyfarpar gan bedwar arsylwr gan gymryd nodiadau cyn i'r arddangosiad ddechrau, canslodd Matthews y digwyddiad a gyrrodd yr arsylwyr i ffwrdd. </p><p>Rhuthrodd y papurau newydd i amddiffyn Matthews. Gwadodd y Swyddfa Ryfel unrhyw ymyrraeth gan honni bod yr arddangosiad yn fethiant. Dywedodd y llywodraeth yn ddiweddarach mai dim ond camddealltwriaeth oedd y mater. </p><p>Ym 1914, ar ôl dechrau'r <a href="/wiki/Y_Rhyfel_Byd_Cyntaf" title="Y Rhyfel Byd Cyntaf">Rhyfel Byd Cyntaf</a>, cyhoeddodd llywodraeth Prydain ddyfarniad o £25,000 i unrhyw un a allai greu arf yn erbyn zeppelin neu reoli cerbydau heb griw o bell. Honnodd Matthews ei fod wedi datblygu system rheoli o bell gan ddefnyddio celloedd <a href="/wiki/Seleniwm" title="Seleniwm">seleniwm</a>. Llwyddodd Matthews i’w ddangos yn llwyddiannus gyda chwch a reolir o bell i gynrychiolwyr y Morlys ym Mhwll Penn Richmond Park. Derbyniodd Matthews ei £25,000, ond ni ddefnyddiodd y Morlys y ddyfais erioed. </p><p>Nesaf, ymddangosodd Matthews yn gyhoeddus ym 1921 gan honni iddo ddyfeisio’r 'llun llafar' cyntaf yn y byd, cyfweliad ffarwel ag <a href="/wiki/Ernest_Shackleton" title="Ernest Shackleton">Ernest Shackleton</a> a recordiwyd ar 16 Medi 1921, ychydig cyn taith olaf Shackleton. Nid oedd y ffilm yn fasnachol lwyddiannus. Roedd prosesau lluniau llafar eraill wedi'u datblygu cyn un Matthews, gan gynnwys prosesau gan William KL Dickson, Photokinema (Orlando Kellum) a Phonofilm (Lee DeForest). Fodd bynnag, honnodd Matthews mai ei broses ef oedd y sain-ar-ffilm gyntaf. </p> <div class="mw-heading mw-heading2"><h2 id="Pelydr_angau">Pelydr angau</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Harry_Grindell_Matthews&veaction=edit&section=2" title="Golygu'r adran: Pelydr angau" class="mw-editsection-visualeditor"><span>golygu</span></a><span class="mw-editsection-divider"> | </span><a href="/w/index.php?title=Harry_Grindell_Matthews&action=edit&section=2" title="Edit section's source code: Pelydr angau"><span>golygu cod</span></a><span class="mw-editsection-bracket">]</span></span></div> <figure class="mw-default-size" typeof="mw:File/Thumb"><a href="/wiki/Delwedd:Grindell-Matthews_death_ray.jpg" class="mw-file-description"><img src="//upload.wikimedia.org/wikipedia/commons/thumb/f/f2/Grindell-Matthews_death_ray.jpg/220px-Grindell-Matthews_death_ray.jpg" decoding="async" width="220" height="246" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/f/f2/Grindell-Matthews_death_ray.jpg/330px-Grindell-Matthews_death_ray.jpg 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/f/f2/Grindell-Matthews_death_ray.jpg/440px-Grindell-Matthews_death_ray.jpg 2x" data-file-width="942" data-file-height="1055" /></a><figcaption> Llun 1925 sy'n honni ei fod yn dangos arddangosiad nos o'r pelydryn ar Ynys <a href="/wiki/Ynys_Echni" title="Ynys Echni">Echni</a></figcaption></figure> <p>Ym 1923, honnodd Matthews ei fod wedi dyfeisio pelydr trydan a fyddai'n gallu atal magnetos (generadur trydan) rhag gweithredu. Mewn arddangosiad i rai newyddiadurwyr fe stopiodd Matthews injan beic modur o bellter. Honnodd Matthews hefyd, gyda digon o bŵer, y gallai saethu awyrennau i lawr, ffrwydro <a href="/wiki/Powdwr_gwn" title="Powdwr gwn">powdwr gwn</a>, stopio llongau, ac analluogi milwyr traed o bellter o 4 milltir (6.4 km). Cafodd anogaeth gan y papurau newydd a gyhoeddwyd adroddiadau anhygoel o'i ddyfais. </p><p>Cysylltodd y Swyddfa Ryfel â Matthews ym mis Chwefror 1924 i ofyn am arddangosiad o'i belydr. Ni ymatebodd Matthews iddynt ond siaradodd â newyddiadurwyr a dangos y pelydr i ohebydd papur y <i>Star</i> trwy danio powdwr gwn o bell. Roedd Matthews yn dal i wrthod dweud sut roedd y pelydryn yn gweithio ond mynnodd ei fod yn gweithio. Pan oedd llywodraeth Prydain yn dal i wrthod rhuthro i brynu ei syniadau, cyhoeddodd Matthews fod ganddo gynnig o Ffrainc. </p><p>Roedd y Weinyddiaeth Awyr yn wyliadwrus, yn rhannol oherwydd profiadau gwael cyn hynny gyda darpar ddyfeiswyr. Gwahoddwyd Matthews yn ôl i Lundain i arddangos ei belydrau i’r lluoedd arfog ar 26 Ebrill. Yn labordy Matthews, gwelsant sut roedd ei belydryn yn troi bwlb golau ymlaen ac yn torri modur i ffwrdd. Methodd Matthews ag argyhoeddi'r swyddogion, a oedd hefyd yn amau twyll neu gêm hyder. Pan ofynnodd Morlys Prydain am arddangosiad pellach, gwrthododd Matthews ei roi. </p><p>Ar 27 Mai 1924, rhoddodd yr Uchel Lys yn Llundain orchymyn i fuddsoddwyr Matthew a oedd yn ei wahardd rhag gwerthu'r hawliau i'r pelydryn marwolaeth. Pan gyrhaeddodd yr Uwchgapten Wimperis labordy Matthews i drafod cytundeb newydd, roedd Matthews eisoes wedi hedfan i Baris. Ymddangosodd cefnogwyr Matthews ar y safle hefyd a rhuthro i faes awyr Croydon i'w atal, ond roedd hi'n rhy hwyr. </p><p>Oherwydd brwdfrydedd y cyhoedd denodd hyn ddarpar ddyfeiswyr eraill a oedd am ddangos pelydrau marwolaeth i'r Swyddfa Ryfel. Nid oedd yr un ohonynt yn argyhoeddi. Ar 28 Mai, gofynnodd y Comander Kenworthy yn <a href="/wiki/T%C5%B7%27r_Cyffredin_(Y_Deyrnas_Unedig)" title="Tŷ'r Cyffredin (Y Deyrnas Unedig)">Nhŷ’r Cyffredin</a> beth roedd y llywodraeth yn bwriadu ei wneud i atal Matthews rhag gwerthu’r pelydryn i bŵer tramor.<sup id="cite_ref-4" class="reference"><a href="#cite_note-4"><span class="cite-bracket">[</span>4<span class="cite-bracket">]</span></a></sup> Atebodd yr Is-ysgrifennydd Awyr nad oedd Matthews yn fodlon gadael iddynt ymchwilio i'r pelydryn i'w boddhad. Dywedodd cynrychiolydd o'r llywodraeth hefyd fod un swyddog y weinyddiaeth wedi sefyll o flaen y pelydr ac wedi goroesi. Parhaodd y papurau newydd i gefnogi Matthews. </p><p>Roedd y llywodraeth yn mynnu bod Matthews yn arddangos pelydryn i stopio injan betrol betrol o dan amodau fyddai'n bodloni'r Weinyddiaeth Awyr. Byddai Matthews yn derbyn £1000 ac ystyriaeth pellach. O Ffrainc, atebodd Matthews nad oedd yn fodlon rhoi prawf o'r math hwnnw a bod ganddo eisoes wyth cynnig i ddewis ohonynt. Honnodd Matthews hefyd ei fod wedi colli golwg yn ei lygad chwith oherwydd ei arbrofion. Cododd ei gysylltiad â'i gefnogwr Ffrengig <a href="/w/index.php?title=Eugene_Royer&action=edit&redlink=1" class="new" title="Eugene Royer (nid yw'r dudalen yn bodoli)">Eugene Royer</a> amheuon pellach ym Mhrydain. </p><p>Cynigiodd Syr Samuel Instone a'i frawd Theodore gyflog enfawr i Matthews pe bai'n cadw'r pelydryn ym Mhrydain a dangos ei fod yn gweithio mewn gwirionedd. Gwrthododd Matthews eto—nid oedd am roi unrhyw brawf bod y pelydryn yn gweithio fel yr honnai y byddai. </p><p>Dychwelodd Matthews i Lundain ar 1 Mehefin 1924 a rhoddodd gyfweliad i'r <i>Sunday Express</i>. Honnodd Matthews fod ganddo gytundeb gyda Royer. Cymerodd y wasg ei ochr unwaith eto. Yr unig arddangosiad yr oedd Matthews yn fodlon ei roi oedd gwneud ffilm <i>The Death Ray</i> gyda <i>Pathé</i> i ledaenu ei syniadau i'w foddhad. Nid oedd y ddyfais yn y ffilm yn debyg i'r un a welodd swyddogion y llywodraeth. </p><p>Ym mis Gorffennaf 1924, gadawodd Matthews am yr Unol Daleithiau i farchnata ei ddyfais. Pan gynigiwyd $25,000 i Matthews i arddangos ei belydryn i Ffair Radio'r Byd yn Madison Square Garden, gwrthododd eto a honnodd, yn ddi-sail, na chaniateir iddo ei arddangos y tu allan i Loegr. Ni wnaeth argraff ar wyddonwyr yr Unol Daleithiau. Cynigiodd un Athro Woods sefyll o flaen y ddyfais pelydr marwolaeth i ddangos ei anghrediniaeth. Serch hynny, pan ddychwelodd Matthews i Brydain, honnodd fod yr UDA wedi prynu ei belydryn ond gwrthododd ddweud pwy oedd wedi gwneud ac am faint. Symudodd Matthews i'r Unol Daleithiau a dechreuodd weithio i <a href="/wiki/Warner_Bros." title="Warner Bros.">Warner Bros.</a> </p> <div class="mw-heading mw-heading2"><h2 id="Dyfeisiadau_pellach">Dyfeisiadau pellach</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Harry_Grindell_Matthews&veaction=edit&section=3" title="Golygu'r adran: Dyfeisiadau pellach" class="mw-editsection-visualeditor"><span>golygu</span></a><span class="mw-editsection-divider"> | </span><a href="/w/index.php?title=Harry_Grindell_Matthews&action=edit&section=3" title="Edit section's source code: Dyfeisiadau pellach"><span>golygu cod</span></a><span class="mw-editsection-bracket">]</span></span></div> <p>Ym 1925, dyfeisiodd Matthews yr hyn a alwodd yn "luminaphone". </p><p>Ar 24 Rhagfyr 1930, roedd Matthews yn ôl yn Lloegr gyda'i greadigaeth newydd - <a href="/w/index.php?title=Sky_Projector&action=edit&redlink=1" class="new" title="Sky Projector (nid yw'r dudalen yn bodoli)">Taflunydd Awyr</a> a oedd <a href="/wiki/Taflunydd" title="Taflunydd">yn taflu</a> lluniau ar gymylau. Dangosodd Matthews hyn yn Hampstead trwy daflunio angel, y neges "Nadolig Hapus", ac wyneb cloc oedd yn ôl pob sôn yn "gywir". Arddangosodd Matthews hyn eto yn Efrog Newydd. Roedd y ddyfais hon yn aflwyddiannus, ac erbyn 1931, roedd Matthews yn wynebu methdaliad. Defnyddiodd Matthews y rhan fwyaf o arian ei fuddsoddwyr i fyw mewn gwestai drud. </p><p>Ym 1934, cafodd Matthews griw newydd o fuddsoddwyr a symudodd i <a href="/wiki/Tor_Clawdd" title="Tor Clawdd">Tor Clawdd</a> ar Fynydd y Gwair ger Abertawe. Adeiladodd Matthews labordy cadarn a maes awyr. Ym 1935, honnodd Matthews ei fod yn gweithio ar pelenni ffrwydrol awyr ac, yn 1937, dyfeisiodd system ar gyfer canfod <a href="/wiki/Llong_danfor" title="Llong danfor">llongau tanfor</a>. Ym 1938, priododd Matthews â Ganna Walska, cantores opera Pwylaidd-Americanaidd, persawrydd, a ffeminydd. Roedd ei phedwar gŵr blaenorol wedi bod yn berchen ar ffortiwn gyda chyfanswm o $125,000,000. </p><p>Ym 1935, daeth Matthews i gysylltiad â'r gweithredwr asgell dde Lucy, Lady Houston, a'i bwriad oedd cynnal arbrofion i ganfod llongau tanfor llyngesol Ffrainc o'i chwch hwylio moethus, y <i>Liberty</i>. Yn 2010, croniclodd ymchwil newydd<sup id="cite_ref-5" class="reference"><a href="#cite_note-5"><span class="cite-bracket">[</span>5<span class="cite-bracket">]</span></a></sup> y bennod, gan esbonio sut roedd Matthews yn rhwystredig wrth gyflawni ei amcanion. </p><p>Yn ddiweddarach, siaradodd Matthews am y syniad o'r "stratoplane" ac ymunodd â'r Gymdeithas Ryngblanedol Brydeinig. Oherwydd ei fethiannau blaenorol i brofi'u ddyfeisiau nid oedd gan Lywodraeth Prydain ddiddordeb yn ei syniadau mwyach. </p> <div class="mw-heading mw-heading2"><h2 id="Bywyd_personol">Bywyd personol</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Harry_Grindell_Matthews&veaction=edit&section=4" title="Golygu'r adran: Bywyd personol" class="mw-editsection-visualeditor"><span>golygu</span></a><span class="mw-editsection-divider"> | </span><a href="/w/index.php?title=Harry_Grindell_Matthews&action=edit&section=4" title="Edit section's source code: Bywyd personol"><span>golygu cod</span></a><span class="mw-editsection-bracket">]</span></span></div> <p>Harry Grindell Matthews oedd pumed gwr y gantores Ganna Walska; priodasant yn 1938.<sup id="cite_ref-6" class="reference"><a href="#cite_note-6"><span class="cite-bracket">[</span>6<span class="cite-bracket">]</span></a></sup> Bu farw Matthews o drawiad ar y galon ar 11 Medi 1941.<sup id="cite_ref-7" class="reference"><a href="#cite_note-7"><span class="cite-bracket">[</span>7<span class="cite-bracket">]</span></a></sup> Gwasgarwyd ei lwch ger ei labordy ar Fynydd y Gwair.<sup id="cite_ref-8" class="reference"><a href="#cite_note-8"><span class="cite-bracket">[</span>8<span class="cite-bracket">]</span></a></sup> </p> <div class="mw-heading mw-heading2"><h2 id="Cyfeiriadau">Cyfeiriadau</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Harry_Grindell_Matthews&veaction=edit&section=5" title="Golygu'r adran: Cyfeiriadau" class="mw-editsection-visualeditor"><span>golygu</span></a><span class="mw-editsection-divider"> | </span><a href="/w/index.php?title=Harry_Grindell_Matthews&action=edit&section=5" title="Edit section's source code: Cyfeiriadau"><span>golygu cod</span></a><span class="mw-editsection-bracket">]</span></span></div> <div class="reflist" style="list-style-type: decimal;"> <div class="mw-references-wrap"><ol class="references"> <li id="cite_note-1"><span class="mw-cite-backlink"><a href="#cite_ref-1">↑</a></span> <span class="reference-text"><cite class="citation web"><a rel="nofollow" class="external text" href="http://www.frenchaymuseumarchives.co.uk/Archives/PagesBiogy/Matthews_HG.htm">"Harry Grindell Matthews of Winterbourne"</a><span class="reference-accessdate">. Cyrchwyd <span class="nowrap">14 Mawrth</span> 2025</span>.</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Abook&rft.genre=unknown&rft.btitle=Harry+Grindell+Matthews+of+Winterbourne&rft_id=http%3A%2F%2Fwww.frenchaymuseumarchives.co.uk%2FArchives%2FPagesBiogy%2FMatthews_HG.htm&rfr_id=info%3Asid%2Fcy.wikipedia.org%3AHarry+Grindell+Matthews" class="Z3988"></span><style data-mw-deduplicate="TemplateStyles:r8312344">.mw-parser-output cite.citation{font-style:inherit}.mw-parser-output .citation q{quotes:"\"""\"""'""'"}.mw-parser-output .citation .cs1-lock-free a{background:url("//upload.wikimedia.org/wikipedia/commons/thumb/6/65/Lock-green.svg/9px-Lock-green.svg.png")no-repeat;background-position:right .1em center}.mw-parser-output .citation .cs1-lock-limited a,.mw-parser-output .citation .cs1-lock-registration a{background:url("//upload.wikimedia.org/wikipedia/commons/thumb/d/d6/Lock-gray-alt-2.svg/9px-Lock-gray-alt-2.svg.png")no-repeat;background-position:right .1em center}.mw-parser-output .citation .cs1-lock-subscription a{background:url("//upload.wikimedia.org/wikipedia/commons/thumb/a/aa/Lock-red-alt-2.svg/9px-Lock-red-alt-2.svg.png")no-repeat;background-position:right .1em center}.mw-parser-output .cs1-subscription,.mw-parser-output .cs1-registration{color:#555}.mw-parser-output .cs1-subscription span,.mw-parser-output .cs1-registration span{border-bottom:1px dotted;cursor:help}.mw-parser-output .cs1-ws-icon a{background:url("//upload.wikimedia.org/wikipedia/commons/thumb/4/4c/Wikisource-logo.svg/12px-Wikisource-logo.svg.png")no-repeat;background-position:right .1em center}.mw-parser-output code.cs1-code{color:inherit;background:inherit;border:inherit;padding:inherit}.mw-parser-output .cs1-hidden-error{display:none;font-size:100%}.mw-parser-output .cs1-visible-error{font-size:100%}.mw-parser-output .cs1-maint{display:none;color:#33aa33;margin-left:0.3em}.mw-parser-output .cs1-subscription,.mw-parser-output .cs1-registration,.mw-parser-output .cs1-format{font-size:95%}.mw-parser-output .cs1-kern-left,.mw-parser-output .cs1-kern-wl-left{padding-left:0.2em}.mw-parser-output .cs1-kern-right,.mw-parser-output .cs1-kern-wl-right{padding-right:0.2em}</style></span> </li> <li id="cite_note-2"><span class="mw-cite-backlink"><a href="#cite_ref-2">↑</a></span> <span class="reference-text"><cite id="CITEREFThomas2017" class="citation web">Thomas, Geraint (2017-10-12). <a rel="nofollow" class="external text" href="https://www.walesonline.co.uk/news/wales-news/how-death-ray-inventor-who-13748529">"How 'death ray' inventor built secret WW2 lab on a Welsh mountain"</a>. <i>Wales Online</i> (yn Saesneg)<span class="reference-accessdate">. Cyrchwyd <span class="nowrap">2025-03-05</span></span>.</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.genre=unknown&rft.jtitle=Wales+Online&rft.atitle=How+%27death+ray%27+inventor+built+secret+WW2+lab+on+a+Welsh+mountain&rft.date=2017-10-12&rft.aulast=Thomas&rft.aufirst=Geraint&rft_id=https%3A%2F%2Fwww.walesonline.co.uk%2Fnews%2Fwales-news%2Fhow-death-ray-inventor-who-13748529&rfr_id=info%3Asid%2Fcy.wikipedia.org%3AHarry+Grindell+Matthews" class="Z3988"></span><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r8312344" /></span> </li> <li id="cite_note-3"><span class="mw-cite-backlink"><a href="#cite_ref-3">↑</a></span> <span class="reference-text"><cite class="citation news"><a rel="nofollow" class="external text" href="https://web.archive.org/web/20070927200934/http://www.forteantimes.com/features/profiles/193/grindell_death_ray_matthews.html">"Grindell 'Death Ray' Matthews"</a>. <i><a href="/w/index.php?title=Fortean_Times&action=edit&redlink=1" class="new" title="Fortean Times (nid yw'r dudalen yn bodoli)">Fortean Times</a></i>. Hydref 2003. Archifwyd o'r <a rel="nofollow" class="external text" href="http://www.forteantimes.com/features/profiles/193/grindell_death_ray_matthews.html">gwreiddiol</a> ar 27 Medi 2007<span class="reference-accessdate">. Cyrchwyd <span class="nowrap">21 July</span> 2007</span>. <q>By any standards Harry Grindell Matthews led a remarkable life. Born in 1880 at Winterbourne in Gloucestershire, he was educated at the Merchant Venturer's School in Bristol before training as an electrical engineer. During the Boer War he enlisted in the Baden-Powell South African Constabulary and was wounded twice. On his return to Britain he pursued his interest in the burgeoning electrical sciences on the estate of Lord de la Warr at Bexhill-on-Sea. There he displayed a natural aptitude for "<a href="/w/index.php?title=Thinking_outside_the_box&action=edit&redlink=1" class="new" title="Thinking outside the box (nid yw'r dudalen yn bodoli)">thinking outside the box</a>" and began to first visualise and later produce a remarkable series of inventions.</q></cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.genre=article&rft.jtitle=Fortean+Times&rft.atitle=Grindell+%27Death+Ray%27+Matthews&rft.date=2003-10&rft_id=http%3A%2F%2Fwww.forteantimes.com%2Ffeatures%2Fprofiles%2F193%2Fgrindell_death_ray_matthews.html&rfr_id=info%3Asid%2Fcy.wikipedia.org%3AHarry+Grindell+Matthews" class="Z3988"></span><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r8312344" /></span> </li> <li id="cite_note-4"><span class="mw-cite-backlink"><a href="#cite_ref-4">↑</a></span> <span class="reference-text"><cite class="citation web"><a rel="nofollow" class="external text" href="https://api.parliament.uk/historic-hansard/commons/1924/may/28/air-service-tests">"Air Service Tests"</a>. <i><a href="/w/index.php?title=Hansard&action=edit&redlink=1" class="new" title="Hansard (nid yw'r dudalen yn bodoli)">Parliamentary Debates (Hansard)</a></i>. 28 Mai 1924.</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.genre=unknown&rft.jtitle=Parliamentary+Debates+%28Hansard%29&rft.atitle=Air+Service+Tests&rft.date=1924-05-28&rft_id=https%3A%2F%2Fapi.parliament.uk%2Fhistoric-hansard%2Fcommons%2F1924%2Fmay%2F28%2Fair-service-tests&rfr_id=info%3Asid%2Fcy.wikipedia.org%3AHarry+Grindell+Matthews" class="Z3988"></span><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r8312344" /></span> </li> <li id="cite_note-5"><span class="mw-cite-backlink"><a href="#cite_ref-5">↑</a></span> <span class="reference-text"><cite id="CITEREFCrompton2020" class="citation book">Crompton, Teresa (2020). <i>Adventuress, The Life and Loves of Lucy, Lady Houston</i>. <a href="/w/index.php?title=The_History_Press&action=edit&redlink=1" class="new" title="The History Press (nid yw'r dudalen yn bodoli)">The History Press</a>.</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Abook&rft.genre=book&rft.btitle=Adventuress%2C+The+Life+and+Loves+of+Lucy%2C+Lady+Houston&rft.pub=The+History+Press&rft.date=2020&rft.aulast=Crompton&rft.aufirst=Teresa&rfr_id=info%3Asid%2Fcy.wikipedia.org%3AHarry+Grindell+Matthews" class="Z3988"></span><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r8312344" /></span> </li> <li id="cite_note-6"><span class="mw-cite-backlink"><a href="#cite_ref-6">↑</a></span> <span class="reference-text"><cite class="citation news"><a rel="nofollow" class="external text" href="https://www.nytimes.com/1937/08/20/archives/scientist-asserts-hell-wed-walska-grindellmatthewsdeath-ray.html">"Scientist Asserts He'll Wed Walska. Grindell-Matthews,'Death Ray' Inventor, Says He Will Marry Polish Opera Singer Soon. They Met 3 Months Ago. Marriage Would Be the Fifth for Mme. Walska, Once Wife of Harold Fowler McCormick"</a>. <i>The New York Times</i> (yn Saesneg). 20 Awst 1937<span class="reference-accessdate">. Cyrchwyd <span class="nowrap">4 Medi</span> 2012</span>. <q>Harry Grindell-Matthews, genial 57-year old 'death ray' inventor, said today that he would marry Ganna Walska, Polish opera singer whose fourth husband was Harold Fowler McCormick, Chicago harvester magnate.</q></cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.genre=article&rft.jtitle=The+New+York+Times&rft.atitle=Scientist+Asserts+He%27ll+Wed+Walska.+Grindell-Matthews%2C%27Death+Ray%27+Inventor%2C+Says+He+Will+Marry+Polish+Opera+Singer+Soon.+They+Met+3+Months+Ago.+Marriage+Would+Be+the+Fifth+for+Mme.+Walska%2C+Once+Wife+of+Harold+Fowler+McCormick&rft.date=1937-08-20&rft_id=https%3A%2F%2Fwww.nytimes.com%2F1937%2F08%2F20%2Farchives%2Fscientist-asserts-hell-wed-walska-grindellmatthewsdeath-ray.html&rfr_id=info%3Asid%2Fcy.wikipedia.org%3AHarry+Grindell+Matthews" class="Z3988"></span><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r8312344" /></span> </li> <li id="cite_note-7"><span class="mw-cite-backlink"><a href="#cite_ref-7">↑</a></span> <span class="reference-text"><cite class="citation news"><a rel="nofollow" class="external text" href="https://web.archive.org/web/20100903235227/http://www.time.com/time/magazine/article/0,9171,795510,00.html">"Died"</a>. <i>Time</i>. 22 Medi 1941. Archifwyd o'r <a rel="nofollow" class="external text" href="http://www.time.com/time/magazine/article/0,9171,795510,00.html">gwreiddiol</a> ar 3 Medi 2010<span class="reference-accessdate">. Cyrchwyd <span class="nowrap">21 Gorffennaf</span> 2007</span>. <q>Harry Grindell-Matthews, 61, inventor of a highly publicized "death ray," fifth husband of Singer Ganna Walska; in his lonely, electrically guarded bungalow laboratory near Swansea, Wales. An electrical researcher, he developed submarine detectors, 'aerial mines,' remote-control devices, sound-film synchronization, in 1911 established wireless communication with a plane in flight.</q></cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.genre=article&rft.jtitle=Time&rft.atitle=Died&rft.date=1941-09-22&rft_id=http%3A%2F%2Fwww.time.com%2Ftime%2Fmagazine%2Farticle%2F0%2C9171%2C795510%2C00.html&rfr_id=info%3Asid%2Fcy.wikipedia.org%3AHarry+Grindell+Matthews" class="Z3988"></span><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r8312344" /></span> </li> <li id="cite_note-8"><span class="mw-cite-backlink"><a href="#cite_ref-8">↑</a></span> <span class="reference-text"><cite id="CITEREFBevan2021" class="citation web">Bevan, Nathan (2021-11-18). <a rel="nofollow" class="external text" href="https://www.walesonline.co.uk/lifestyle/nostalgia/lonely-bungalow-moorland-quiet-loner-22190997">"The lonely bungalow on Welsh moorland where a quiet loner built secret death ray"</a>. <i>Wales Online</i> (yn Saesneg)<span class="reference-accessdate">. Cyrchwyd <span class="nowrap">2025-03-05</span></span>.</cite><span title="ctx_ver=Z39.88-2004&rft_val_fmt=info%3Aofi%2Ffmt%3Akev%3Amtx%3Ajournal&rft.genre=unknown&rft.jtitle=Wales+Online&rft.atitle=The+lonely+bungalow+on+Welsh+moorland+where+a+quiet+loner+built+secret+death+ray&rft.date=2021-11-18&rft.aulast=Bevan&rft.aufirst=Nathan&rft_id=https%3A%2F%2Fwww.walesonline.co.uk%2Flifestyle%2Fnostalgia%2Flonely-bungalow-moorland-quiet-loner-22190997&rfr_id=info%3Asid%2Fcy.wikipedia.org%3AHarry+Grindell+Matthews" class="Z3988"></span><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r8312344" /></span> </li> </ol></div></div> <div class="mw-heading mw-heading2"><h2 id="Dolenni_allanol">Dolenni allanol</h2><span class="mw-editsection"><span class="mw-editsection-bracket">[</span><a href="/w/index.php?title=Harry_Grindell_Matthews&veaction=edit&section=6" title="Golygu'r adran: Dolenni allanol" class="mw-editsection-visualeditor"><span>golygu</span></a><span class="mw-editsection-divider"> | </span><a href="/w/index.php?title=Harry_Grindell_Matthews&action=edit&section=6" title="Edit section's source code: Dolenni allanol"><span>golygu cod</span></a><span class="mw-editsection-bracket">]</span></span></div> <ul><li><span typeof="mw:File"><span><img alt="" src="//upload.wikimedia.org/wikipedia/commons/thumb/4/4a/Commons-logo.svg/12px-Commons-logo.svg.png" decoding="async" width="12" height="16" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/4/4a/Commons-logo.svg/18px-Commons-logo.svg.png 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/4/4a/Commons-logo.svg/24px-Commons-logo.svg.png 2x" data-file-width="1024" data-file-height="1376" /></span></span> Cyfryngau perthnasol <a href="https://commons.wikimedia.org/wiki/Category:Harry_Grindell_Matthews" class="extiw" title="commons:Category:Harry Grindell Matthews">Harry Grindell Matthews</a> ar Gomin Wicimedia</li> <li><a rel="nofollow" class="external text" href="https://www.imdb.com/name/nm1425476/">Harry Grindell Matthews</a> ar yr <a href="/wiki/Internet_Movie_Database" title="Internet Movie Database">Internet Movie Database</a></li></ul> <ul><li>H. Grindell-Matthews, "<a rel="nofollow" class="external text" href="http://www.americanradiohistory.com/Archive-Popular-Radio/Popular-Radio-1924-08.pdf">Diabolic Rays</a>", <i>Popular Radio</i> magazine, New York, Vol. 6, No. 4, August 1924, p. 149-154. In the article, Grindell-Matthews briefly describes the rays and what they can do.</li> <li><a rel="nofollow" class="external text" href="https://web.archive.org/web/20160322021749/http://www.harrygrindellmatthews.com/">Archif Gwefan Harry Grindell Matthews</a></li></ul> <div role="navigation" class="navbox" aria-labelledby="Awdurdod" style="padding:3px"><table class="nowraplinks hlist navbox-inner" style="border-spacing:0;background:transparent;color:inherit"><tbody><tr><th id="Awdurdod" scope="row" class="navbox-group" style="width:1%"><a href="/wiki/Awdurdod" class="mw-redirect" title="Awdurdod">Awdurdod</a></th><td class="navbox-list navbox-odd" style="text-align:left;border-left-width:2px;border-left-style:solid;width:100%;padding:0px"><div style="padding:0em 0.25em"> <ul><li><a rel="nofollow" class="external text" href="//www.worldcat.org/identities/lccn-no2010-113965">WorldCat</a></li> <li><a href="/wiki/Virtual_International_Authority_File" class="mw-redirect" title="Virtual International Authority File">VIAF</a>: <span class="uid"><a rel="nofollow" class="external text" href="https://viaf.org/viaf/156355511">156355511</a></span></li> <li><a href="/wiki/Library_of_Congress_Control_Number" class="mw-redirect" title="Library of Congress Control Number">LCCN</a>: <span class="uid"><a rel="nofollow" class="external text" href="http://id.loc.gov/authorities/names/no2010113965">no2010113965</a></span></li> <li><a href="/wiki/International_Standard_Name_Identifier" class="mw-redirect" title="International Standard Name Identifier">ISNI</a>: <span class="uid"><a rel="nofollow" class="external text" href="http://isni.org/0000000104519692">0000 0001 0451 9692</a></span></li> <li><a href="/wiki/Biblioth%C3%A8que_nationale_de_France" title="Bibliothèque nationale de France">BNF</a>: <span class="uid"><a rel="nofollow" class="external text" href="http://catalogue.bnf.fr/ark:/12148/cb170751707">cb170751707</a> <a rel="nofollow" class="external text" href="http://data.bnf.fr/ark:/12148/cb170751707">(data)</a></span></li></ul> </div></td></tr></tbody></table></div>    </div><noscript><img src="https://login.wikimedia.org/wiki/Special:CentralAutoLogin/start?useformat=desktop&type=1x1&usesul3=0" alt="" width="1" height="1" style="border: none; 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