An account, [1700x1750], of medieval Welsh politics from the twelfth century to the fifteenth century, with particular reference to Powys; together with an account, [c.1730], of the history of the Herbert family (both of Powis Castle and of Cherbury) to the 1730s; and drafts, [1700x1750], of a comedy and a tragedy.

Manuscripts and rare books relating mostly to the counties of Brecknockshire and Carmarthenshire, on subjects such as history, topography and especially genealogy, 1604-1859, including a transcript of the Golden Grove Book of pedigrees and other pedigrees, relating mainly to South Wales families; 19th century transcripts and copies of letters, including some from Sir Walter Raleigh, [1624]-[1807]; lists of Carmarthenshire sheriffs and Brecknockshire Lords Lieutenant, 1809-1849; parts of original manuscripts of Theophilus Jones and William Owen Pughe, [1792]-[1805]; notebooks and scrapbooks, 1839; and various annotated printed books; and deeds and other documents, 1588-1911, relating mostly to properties in Brecknockshire (particularly in the parish of Bronllys), with a few relating to Carmarthen and Swansea.