Sion Trevor, Llyfr arveu and Buchedd Sant Martin

Scope and Content

An envelope containing typescript of 'Sion Trevor, Llyfr arveu and Buchedd Sant Martin' (published in B.B.C.S.V), with two other typescripts (never published?) entitled 'Sion Trevor o Wigynt', in which E.J.J. attacks Sir Ifor Williams and defends the theory put forward in B.B.C.S.V.