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Llinell 12:
==Gwaith y Friars’ Coat==
Cyfeiriodd Elizabeth Baker yn ei dyddiadur 3 Rhagfyr 1770; Dolgelley fel hyn:
Parthed y cyfeiriad at Friar’s Coat [Bwletin 59, tud. 3] y mae’n enw ar waith copr, ac o bosib yr un lle a “Tyllau Mwyn” SH844205 ar y map. Dyma gyfeiriad ato oddi ar y we:▼
'' ...work [on?] the upper part is from the bottom of the level where the Friars Coat was got - but as I told you in my last [letter], the snow and the winds are such that the men cannot work there yet - so high on the mountain''<ref>Dyddiadur Elizabeth Baker (Llyfrgell Genedlaethol)</ref>
:''A remote location marked on old OS maps as Tyllau mwn (mine shafts). Thought to be the site of an unsuccessful trial referred to under the name of Friar's Coat in 1770. According to the Geological Survey, iron ore (bedded oolitic ironstone with magnetite) was raised here in about 1878, 1910 and 1920.''<ref>Steffan ab Owain{{citation needed|date=June 2017}}</ref>▼
Roedd EB yn berchen ar fwynfeydd yn ardal Dolgellau. Tybed beth yw’r “friar’s coat”? Cyfeiriad at Frodyr Gwynion Abaty Cymer efallai?
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▲:''A remote location marked on old OS maps as Tyllau mwn (mine shafts). Thought to be the site of an unsuccessful trial referred to under the name of Friar's Coat in 1770. According to the Geological Survey, iron ore (bedded oolitic ironstone with magnetite) was raised here in about 1878, 1910 and 1920.''<ref>Steffan ab Owain{{citation needed|date=
Mae cyfeiriad Elizabeth Baker ato yn 1770 yn mynd ar hanes yn ôl ymhellach felly?
==Abertawe a Llanelli==
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