The group comprises original and copy wills, administration bonds, occasional inventories and other documents associated with probate belonging to the main families of Griffith of Garn, 1685-1835, Hughes of Gwydir, Weeg, Llwyn Gronw and Cae'r berllan, 1670-1823, Roberts of Bryn y neuadd, 1714-1774, Wynne of Garthmeilio, Cwm Mein and Plasnewydd, 1782, 1811, Wynne of Voelas, 1732, and two other families, Griffith (ancestors of Davies of Trewylan), 1666, and Chambres of Plas Chambres, 1704.

A notebook in the hand of J. H. Davies containing extracts, 1700-98, from Index Books 1-2 of probate records of the archdeaconries of St Davids and Cardigan, then in the District Probate Registry, Carmarthen, and subsequently transferred to the National Library of Wales. The extracts are confined largely to an area covering Caron, Trefilan, Llanddewibrefi, Llanbadarn-odwyn, Llangeitho and Nancwnlle, Cardiganshire. At the end of the volume is a list from Index Book 2 of wills and administrations 1746-97, of persons largely surnamed Rowland.