An incomplete transcript by John Williams (1833-1872) of a history of the town and borough of Beaumaris written by William Williams (c. 1625-1684), [c. 1675], together with notes and extracts from British Museum Harleian MS 2129 and other sources relating to inscriptions in Beaumaris church and elsewhere.
William Williams's original manuscript is now NLW MS 9081D.

'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.