Disgrifiad
Miscellaneous produced as part of the Brecon Forest Tramroad publication. Includes notes on gradient profiles and gradient diagrams; floor plan of Glan Usk House; Reconstruction of water-powered instillations at Clydach and several sketches including of Castell Du plate way; Granwen Depot; Ysnysgedwyn Incline; Penclawdd Bridge; Twyn-y-Ffald Limekilns; Banwen Weighbridge hut and Gwaunclawdd Bridge'
