This former railway warehouse of the 1830s is now known as Castell-du Farmhouse. Built in 1832-34 Joseph Claypon at the same time as the Claypon's Extension Tramroad of the Brecon Forest Tramroad from the Swansea Canal at Gurnos, the Ynyscedwyn Ironworks over Mynydd y Drum to the Tramroad near Onllwyn. Published as part of Stephen Hughes, 'The Archaeology of an Early Railway System: The Brecon Forest Tramroads' (RCAHMW, Aberystwyth, 1990).

Stephen R. Hughes, 08.09.2007.