Draft pedigrees and miscellaneous genealogical extracts and notes from parish registers and other manuscript sources and from printed publications relating largely to individual Montgomeryshire families, e.g., Jervis of Llanbryn-mair, Burton of Darowen, Bennett of Trefeglwys, etc., Bowen of Trefeglwys and Llanwnnog, Swancott of Trefeglwys and Llanwnnog, Kinsey of Llandinam, Savage of Trefeglwys and Llanwnnog, Goodwyn of Trefeglwys, Worthington of Trefeglwys, Mills of Trefeglwys, Jerman of Trefeglwys, Ashton of Trefeglwys, Pughe of Darowen and Penegoes, Pugh of Aberffrydlan [in Llanwrin] and Abergwydol [in Darowen], etc. Among other items included in the extracts are some nineteenth century statistics of Calvinistic Methodist churches and Sunday Schools in the Llanidloes area; material relating to Llanbryn-mair from parochial records, 1663-1821, and from records of the Court of Great Sessions, 1662-85/6; abstracts of probate records of Quakers in Trefeglwys, 1708-76; and a pedigree chart of Principal J. H. Davies, University College of Wales, Aberystwyth.

Collectanea of T. Mordaf Pierce relating mainly to the civil and religious history of Llanidloes and Dolgellau, including a list of mayors of Llanidloes (1540-1909); a list of books published and printed at Llanidloes (1827-1908) and at Dolgellau (1820-1910); a list of poets and literary men connected with Llanidloes from the fifteenth to the nineteenth century; notes relating to Calvinistic Methodism in Montgomeryshire, particularly in Llanidloes; a list of eminent Merionethshire men and women; notes on Cymdeithas y Cymreigyddion in Dolgellau (founded 1821); etc.

Accounts and other memoranda, 1808-1851, kept by Hugh Jones, junior, relating to Calvinistic Methodism in Llanidloes and the surrounding district.

Miscellanea relating mainly to Calvinistic Methodist affairs in Llanidloes and Dolgellau, with autograph letters from Lewis Edwards, Bala, and Richard Bennett.