Financial records of the Breconshire estate, comprising rentals (called audit books by the Tredegar estate), 1758-1927, draft and copy audit books, 1872-1915, farm rent ledgers, 1867-1921, Palleg, Brecon and Dderw estate rent ledgers, 1867-1941, rent collection books, 1868-1937, cash books, 1864-1940, surveyor's bills, 1862-1890, employee records, 1889-1935, taxation records, 1910-c.1936, and vouchers, 1850-1938.

Minute-book of the Palleg commoners' committee, 1871-1905, concerning the regulating of the number of sheep and cattle on Palleg mountain in the parish of Ystradgynlais, Breconshire, the appointment of shepherds, and other matters relating to the common.

The file includes typescript copies of poems by George Tattum, a MS book of poetry by W. E. Jones, a MS copy of an autobiography, 'Men, Mines and Miners' by Richard J. Rees, and papers relating to a photographic exhibition of Soviet Life in Ystradgynlais.

Records of the Ystradgynlais and Swansea Colliery Company, 1803-1936, comprising minute book of meetings of directors and shareholders, 1874-1936, share ledger, 1874-1886, and deeds and documents of the company, relating mainly to the Ystrad-fawr estate, Ystradgynlais, Brecknockshire, 1803-1903.