Papers relating to the activities of David Davies, Llandinam, including relating to contracting in the construction of railways, the establishment of the Ocean Coal Co. Ltd, legal papers collected for the 1883 and 1884 Barry Dock Bills, and his son Edward Davies's letter-books.

Records, 1883-98, relating mainly to a case of alleged breach of contract between the Rhondda and Swansea Bay Railway Company and William Jones of Neath, building contractor. They include the records of the Rhondda and Swansea Bay Railway Company, 1878-1894, mainly financial; account books of William Jones of Neath, one of the contractors involved in building the Rhondda tunnel, 1884-1898, and papers relating to the breach of contract, 1884-1896, brought by William Jones against the company.