Copi carbon o lythyr teipysgrif, 17 Chwefror 1971, oddi wrth Yr Athro Melville Richards, [Coleg Prifysgol Gogledd Cymru, Bangor], at E. T. Jones, Clerc Cyngor Dosbarth Gwledig y Fali, [sir Fôn], yn ymateb i ymholiad ganddo ynglŷn â tharddiad yr enw 'Valley'. = A carbon copy typescript letter, 17 February 1971, from Prof. Melville Richards, [University College of North Wales, Bangor], to E. T. Jones, Clerk of Valley Rural District Council, [Anglesey], in response to his enquiry concerning the origin of the name 'Valley'.