Electoral lists of the commotes of: Ardudwy Uwch Artro, 1860-1861; Ardudwy Is Artro, 1861; Mawddwy, [1860s]; Tal-y-bont, 1861-1863; and Ystumanner, 1860; and jury lists for the parishes of Beddgelert; Dolgellau; Llanfihangel-y-Pennant; Llanfihangel-y-traethau; Llanfrothen; Llangelynnin; and Trawsfynydd, 1866.

Deeds, 1490-1977, including deeds and documents mainly relating to properties on Anglesey, Caernarfonshire, Merionethshire and Middlesex, 1675-1977; and deeds relating to properties in Finchley, Middlesex, 1490-1796.

Two books of legal precedents, one containing examples from England, mainly London, and the other containing copies of documents relating to actions in the counties of Anglesey, Caernarvonshire, Merioneth, and Shropshire.

Deeds, documents and probate records, 1617-1853, relating mainly to the parishes of Caerhun, Conwy, Dwygyfylchi, Gyffin, Llanbedrycennin and Llannor, Caernarfonshire, and to the Abbey estate, in Denbighshire, Merionethshire and Caernarfonshire, 1811-1819; notes on sermons, 1861-1889; and miscellaneous papers relating to Amlwch, Anglesey, 1801-1868.

Copies of the Queen's instructions to Henry, Earl of Pembroke, Lord President of the Council in Wales and the Marches, 1586; the commission of the lieutenancy of Wales and the Marches to Henry, Earl of Pembroke, March 22, 1600, with power to make deputations to persons named in the commission for the different counties within the lieutenancy; a petition by six members of the Privy Council to the Lord Keeper to renew the commission of lieutenancy for Merioneth and to leave out the names of John Lewys Owen and Cadwalader ap Ris, who had been arraigned before the Court of Star Chamber for misdemeanours, and to appoint Griffith Vaughan and Robert Lloyd to be deputies for the Earl of Pembroke for that county; a Privy Council letter to the same effect covering a renewed commission to the Earl of Pembroke, March 31, 1600, with a list of justices of the peace for Merioneth; and orders for the reformation of the Court of the Marches, 1577.

A bilingual letter, 1895, from T. E. Ellis 'To the Electors of Merioneth'.

Miscellaneous notes for lectures, addresses and articles, including notes on the early history of Calvinistic Methodism in East Meirioneth.

Deeds and documents, 1511-1905, relating to premises mainly in Merionethshire, including Dolgellau, Llanfachreth, Brithdir, Llangelynnin and Llanelltyd.

Papers of the family of Jones and Pughe-Jones of Ynysgain, Cricieth, Caernarfonshire, 1501-[c. 1955], including deeds, mostly relating to the Cricieth area and to Merionethshire, 1501-1890; and an account book, 1614-1918.

The series comprises crown rent accounts and other relevant papers concerning the Denbighshire, Flintshire and Merionethshire estates of John Wynne Griffith, 1791-[c. 1821] and his son, George, 1843-1845.

Correspondence from members of the public, local organisations, Meirionydd District Council and the Ymgyrch Meirionydd Campaign relating to the plan to include Meirionydd with Dwyfor and Arfon in a new unitary authority as part of local government reorganisation in Wales under the Local Government (Wales) Act 1994.

Deeds and documents, 1598-1856, mostly assignments of mortgage and related bonds, concerning Dôl y Cae and other premises in the parish of Tal-y-llyn, including a lease from William Owen Pughe and his brother Richard to his son Aneurin Owen Pughe.

A copy of the Report of [Sir] John Jervis on Crown Rights in Merioneth, 1840; notes and press cuttings relating to Crown Lands in Caernarvonshire; copies of resolutions passed at a Conference of local Councils, 12 September 1910; and a note on the acquisition of land for afforestation in Wales, 1920.