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Amgueddfa Cymru – Museum Wales
Cyfrol rwymedig yn cynnwys casgliad helaeth o ddiarhebion Cymraeg. (Bu'r casgliad ar un adeg yn eiddo i J. Lloyd Edwards, cyfreithiwr ym Mangor, ac o 1934 ymlaen bu'n eiddo i William M. Williams, Fron, Llanfairpwll. Nid oes wybodaeth pwy a'i luniodd na pha bryd).
