File entitled 'Enwau Lleoedd', 97 ff., as follows: ff. 1-51, series of 7 lectures on place names in Wales. In autograph, and full, 1933-34; ff. 52-55, autograph introduction to the study of place names in Wales; ff. 56-83, list of place names found in various parts of Wales, sometimes including the names of the parishes in which places are situated.; ff. 84-87, brief notes on the mutations occurring in certain place-names when preceded by some prepositions.; ff. 88-95, note-book containing cuttings of a series of press articles by W. Gilbert Williams entitled 'Place names in Rhostryfan', 21 March 1919; ff. 96-97, press cuttings from Y Genedl, Oct. 1920, of two articles and one letter dealing with 'Hen enwau plwyf Llanfair-is-gaer'.