Records of the Welsh estates of the dukes of Beaufort, earlier the earls of Worcester and William Herbert, earl of Pembroke (d. 1469), including records for the Breconshire lordships of Crickhowell, from 1382, and Tretower, from 1532; ministers' accounts for Monmouthshire lordships from 1387 and manorial records for the lordship of Chepstow, from 1568, Monmouth, from 1416, Porthgaseg, from 1262, Raglan, from 1364, Treleck, from 1508, and for the lordship of Usk, from 1517; records for the Seignory of Gower and Kilvey from 1366 and for the borough and manor of Swansea, 1657-1835; deeds from the 13th cent.relating to the Badminton estate in Monmouthshire, Breconshire and in Gower, Glamorganshire; records from the 16 cent. relating to the coal and iron industries in Monmouthshire and Glamorgan; and estate management records including rentals, 1638-1933, accounts of rent arrears, 1669-1839, bailiffs, collectors and stewards' accounts, 1652-1858, and registers of leases, 1629-1918.

Charles Letts's Office Desk Diary, 1936, with detailed entries, apparently in the hand of John Reginald Jones (d. 1964), in which he records the daily occurrences and problems he encountered as manager of Varteg Hill Colliery, Garndiffaith, co. Monmouth [owned by John Vipond & Co. Ltd]; included are references to the fears and unrest of the labour-force because of dangerous and adverse working conditions, and accounts of the writer's confrontations with individual miners.

Eighteen letters, 1921, from Lieutenant A. O. Gillitt of the Portsmouth C Battalion, Royal Navy, to his wife, whilst posted to Newport and Abertyleri, co. Monmouth, during the coalminers' national strike, following a mutiny by members of the Royal Fleet Reserve sent there to protect the pits.