The papers consist mostly of articles written and research work carried out by W. Gilbert Williams such as :
Rhostryfan encroachments - a short account of the encroachments made upon the common lands in Rhostryfan, 1750-1850.
Notes and transcripts of records of Llandwrog and Llanwnda district.
Some Old Families of Dinlle, 1500-1650.
Notes on Edmund Glynn of Hendre, Llanwnda.
Transcript of a Llanwnda Rate Book for 1844.
A short memoir of the Rev. Richard Farringdon, (1702-1772).
An Old Gadlys Family (Llanwnda).
History of Betws Gwernrhiw, pa. Llandwrog, 1943.
Also included is a copy abstract of title to a Pen-y-groes smithy and messuage of Wernlas Wen, pa. Llanwnda with manuscript notes by W. Gilbert Williams on devolution, 1856; and a post card from Cassie Davies of Tregaron to W. Gilbert Williams, 1955.