A volume of notes on Anglesey in the hand of William Williams, Llandygai, most of which are crossed out, consisting of a list of historical events (ff. 1-5), followed by the notes on Anglesey (ff. 6-39v) and 'Kadeir Kerridwen' (f. 40).

A volume of transcripts of leases, grants, charters, etc., 1704-1755, relating to the issues and profits of the origianl seal for cos. Caernarvon, Anglesey, and Merioneth, and of sums of money payable for fines and recoveries levied in the said counties, compiled for reference by William Wynne, serjeant at law, who was granted a lease of the original seal in 1729. The volume is indexed.

An imperfect draft of a plan for a history of Anglesey: Chapter 5. 'of the soil of the Island', etc. (f. 2 recto-verso); Chapter 6. 'of the Inhabitants, Religion and Sects. Their meat & drink. Their raiment. Beds' (ff. 2 verso-3 verso); Chapter 7. 'Catalogues of Fishes, Fowl & Beasts' [heading only] (f. 4); Chapter 8. 'of Reptiles &c. of Trees, Plants Comon in this Island, of Fossils & subteranian [sic] trees' [there are no particulars of reptiles] (f. 4 recto verso)); Chapter 9. 'of the air of the Island', etc. [heading only] (f. 4 verso).

Deeds and documents, 1555-1875, relating to properties in the counties of Pembrokeshire, Anglesey, Montgomeryshire; deeds, 1696-1868, of lands in the parishes of Llanfair Dyffryn Clwyd, Llanelidan, Efenechtyd, and Llanfwrog, Denbighshire; and documents, 1735-1868, relating to the Eyarth Estate, Denbighshire.

Four volumes containing an account of Anglesey, its history and place names compiled by Thomas Pritchard (''Rhen Graswr Elaeth') (Amlwch, 1907).

Counter books, 1914-1926 (with gaps) of Mrs. A. Richard Thomas, Carnarvon, tithe agent and collector for the parishes of Aberdaron, Bettws Garmon, Bottwnog, Clynnog, Criccieth, Dolbenmaen, Edeyrn, Llanaelhaiarn, Llanbeblig, Llanberis, Llanddeiniolen, Llandwrog, Llanengan, Llanfaelrhys, Llanfaglan, Llanfihangel[-y-Pennant], Llanllyfni, Llanor, Llanrug, Llanwnda, Meillteyrn, Penmorfa, and Treflys, co. Caernarvon, and Cerrigceinwen, Llanddygfael, Llanfechell, Llangaffo, Llangeinwen, Llangristiolus, and Newborough, co. Anglesey.

Deeds purchased from W. A. Evans, relating to Denbighshire, Flintshire and Anglesey, 1310-1795.