The archive comprises almost entirely of title deeds relating to the Orielton estate in Pembrokeshire, and to a lesser extent in Angelsey and Caernarfonshire, 1466-1875.

Records of the Picton family of Poyston, Pembrokeshire, and Iscoed, Carmarthenshire, including deeds, 1691-1909; rentals and accounts of the Poyston and Llandow estates, 1806-1842; papers and accounts relating to various members of the Picton family, 1786-1883, and papers of the Brogden family of Porthcawl, Glamorgan, 1884-1925.

Transcripts, from Phillipps and Fenton manuscripts, of eleven early deeds relating mainly to Pembrokeshire.