A typescript dissertation entitled 'A General Survey of the Slate Industry of Caernarvonshire and Merionethshire', by William Morgan Richards, Portmadoc, 1933.

Deeds, relating to properties in the following counties: Anglesey, 1737-1871; Cardiganshire, 1736-1780; Carmarthenshire, 1684-1838; Caernarfonshire, 1831-1878; Denbighshire, 1591-1837; Flintshire, 1465-1855; Glamorgan, 1597-1883; Merionethshire, 1793; Pembrokeshire, 1683-1857; and Radnorshire 1623-1816.

Deeds and other records, 1538-1826, relating to properties mainly in Merionethshire, particularly lands formerly belonging to the dissolved monastery of Cymer [p. Llanelltyd] near Dolgellau, and the rectory of Llanegryn, Merionethshire.

Rentals of the Clenennau, Glyn, Sylfaen and Ystumcegid estates, [1535x1572]-1849. They cover Eifionydd [1535x1572] and Clenennau, 1551-1689, combined with Brogyntyn, Llanddyn and lands in Anglesey from 1589 to 1606; Glyn, 1623; Ystumcegid, 1692-1723; and Clenennau, Glyn, Sylfaen and Ystumcegid, 1690-1849. Gest disappears from the rentals by 1678, which is consistent with Sir Robert Owen's loss of the township to William Price of Rhiwlas. Sir Robert married Margaret Wynn in 1683, but Glyn and Sylfaen in Merionethshire do not appear as joint property until 1690. Some of the Clenennau and Glyn properties appear collectively as the Merionethshire estates from 1727. Likewise by 1749 some of the other Caernarfonshire properties are not distinguished separately from Ystumcegid. From 1779 to 1804, the idividual properties are not identified, but the tenants' names are listed under the vague headings of 'Caernarfonshire estate' or the Merionethshire estate'. The purchased property of Dolbenmaen is incorporated from 1742 and part of the Shropshire and Denbighshire estates are included in 1773. Additions in the form of allotments and encroachments are in evidence from 1832. Several of the rentals incorporate accounts of arrears and repairs to property.

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.

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

Deeds, 1597-1896, relating mainly to properties in Merionethshire with some relating to properties in Caernarfonshire and Montgomeryshire.

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 and documents, 1508-1706, relating to the parishes of Llanbedr and Llandecwyn, Merionethshire.

A group of documents relating to gold mining in Merioneth. It includes notes on various gold mines in the county; correspondence addressed principally to O. Parry Hughes, 1918-36; typescript evidence prepared for the Merioneth Gold Mining Inquiry, 1930, and a report of the proceedings; memoranda relating to the formation and development of the Merioneth Mining Development Committee, 1930; copies of printed reports by Professor Henry Louis on the possibilities of gold mining in Merioneth, 1930; notes on diamond drilling and its possibilities in Merionethshire; together with a few printed items, two photographs, press cuttings and miscellanea.

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.

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.

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.

Llythyrau at D. Tecwyn Lloyd yn y Coleg ym Mangor yn trafod newyddion amaethyddol a lleol. Ceir hefyd draethawd John Lloyd 'Y dull gorau o drin cae oi doriad cyntaf yn dir glas hyd y gwair hadau cyntaf', cyfarfod llenyddol Glanrafon, 1933.