'A Survey of the Ancient and Present State of the County of Caernarvon by a Land surveyor [i.e. William Williams, Llandegai (1738-1817)], 1806', together with a list of the sheriffs of Caernarvonshire, 1540-1796.
Descriptions, with diagrams, of sheep ear-marks used on farms mainly in Caernarvonshire together with the names of the farms and their occupiers, and a few accounts.
Correspondence and documents, 1901, relating to legal matters concerning the Penrhyn quarry. The correspondents include David Lloyd George, and William George (4).
A notebook, 1878-1879, containing sheep earmarks from over two thousand farms in counties Merioneth, Denbigh and Caernarfon, with an index of parishes and localities (pp. 246-7).
Pocket-book of Police Constable John Williams, stationed at Garndolbenmaen, containing a record of sheep earmarks in the parishes of Clynnog, Dolbenmaen, Llanfihangel-y-Pennant and Penmorfa, co. Caernarfon.
A volume of sermons preached during the period 1723-1731 by R. E.? at places in Anglesey and possibly in Caernarvonshire, e.g. Penrh[os], Penm[o]n and Llanfaes. Some of the sermons were preached also during the period 1793-1803.
An imperfect volume of South Caernarvonshire provenance containing accounts of a blacksmith, 1847, and accounts of a farmer [?Watkin Williams], 1847-1861.
A minute book of the Six-weekly Meetings of the Arfon District of Calvinistic Methodist Sunday Schools, Caernarvonshire, 1845-52, mainly in the hand of Richard Owen Williams, Bangor, and subsequently of Thomas Lewis (1821-97), Bangor, Member of Parliament for Anglesey.