Records of Messrs David and David, comprising records of valuations of properties in South Wales and the adjoining counties of England made during the period 1846-1933, including Breconshire, 1872-1912; Carmarthenshire, 1865-1884; Glamorgan, 1846-1926; Monmouthshire, 1867-1933; Gloucestershire, 1875-1880; Herefordshire, 1874-1881; and Somerset, 1876-1885. The records include surveys, reports, valuations, correspondence, notes, plans, valuation schedules, sale notices and copy agreements. Many of the records reflect the industrial and urban development of South Wales and quite a number of the individual valuations are of land subject to compulsory purchase by railway companies and public utilities.

Correspondence and research notes of Dr. A.W.L.Seaman relating to politics in Merthyr Tudful before 1914, comprising correspondence and papers relating to the biographies of three members of parliament for Merthyr Tudful (c. 1880-1914), namely William Pritchard-Morgan, Keir Hardie, and Edgar Jones (including letters from Edgar Jones, 1960-1961,) and newspaper cuttings and ephemera relating to the Merthyr Tydfil parliamentary election, January 1910.