A list of the abbreviations used by Charles Surman for his index cards.
[Brecon Album or an illustrated memorial book, containing short biographies, and 267 illustrations of the students, who were trained for the Independent ministry at Abergavenny, Oswestry, Wrexham, Llanfyllin, Newtown and Brecon, from the year 1755 to 1880].
[History of the Independent Churches of Wales]
[Gallery of the Presbyterian College, Carmarthen. Including the history of all the students who were at the college from 1796 to 1899]
Richards, Thomas, Religious Developments in Wales, 1654-1662 (London, 1923)
Richards, Thomas, Wales under the Penal Code, 1662-1687 (London, 1925)
Richards, Thomas, Wales under the Indulgence, 1672-1675 (London, 1928)