'Historia Bellomarisci or The History of the Towne & Burrough of Bewmares', a draft history in the hand of William Williams, 1675, incorporating documents of an earlier period, 1612-[1650s]; with additional documents, including an original terrier of the rectory of Llandegvan and Beaumaris, 1690.

A mutilated bill book, 1840-1848, of Edward Rumsey Williams, solicitor, Caernarvon. Among the subjects to which the accounts refer are the engrossment of the agreement of tithe commutation for the parish of Llanbadrig, Anglesey, and the execution of conveyances, etc. of properties in Dolbenmaen, Llanfihangel y Pennant, Caernarvon, Bontnewydd, Llanbeblig (including a piece of ground for the building of a school), Pwllheli, and Llanfair is gaer, Caernarvonshire, Llandegfan, Anglesey, Flint, Flintshire, etc.