'Geiriau Groeg-Cymraeg Chwanegol. Y Gyfrol Gyntaf a gynwysa 400 Geiriau Groeg Cymraeg Wedi eu Taflenu'n Gyfochrog yn Nghyd a Sylwadau ar Olion Ffug chwedlau Groeg yn Ofergoelion Cymru. Dilynwyd yr un Cynllun yn y Casgliad yma drwy daflenu y geiriau yn Gyfochrol gyda Nodiadau. Cynwysa'r Casgliad yma 400 Geiriau Cyfochrol Chwanegol . . .', being a glossary of approximately four hundred Greek words compiled by T. Eurwedd Williams, with notes in Welsh purporting to equate them with alleged Welsh cognates. The present volume appears to be a sequel to NLW MS 10680C compiled by the same author.

Miscellaneous letters, 1913-1934, mostly addressed to Philip Thomas, relating mainly to his involvement in local eisteddfodau and musical events. Included are letters and papers relating to Neath Harmonic Society, 1926 (ff. 34-36), and the 1933 Welsh Calvinistic Methodist Parliamentary Bill, 1931 (ff. 47-9); verses relating to the Mari Lwyd (f. 1); a printed programme of service for Central Church, Chicago, 1922 (ff. 11-13); Thomas's adjudication for the choral competition at the Swansea National Eisteddfod, 1926 (ff. 37-41); a printed leaflet for Haslemere Music Festival, 1934 (ff. 60-61); and the tune and words of a Welsh Christmas Carol (f. 53) and of a Welsh folk-song (ff. 64-66).