Signalling miscellany comprising mainly of old books:- First Principles Of Railway Signalling, C.B.Byles, 1918: Railway Signalling & Communications, 1946: Lewis's Railway Signal Engineering, J.H. Fraser 1932: Modern Railway Signalling, M.G.Tweedie & T.S.Lascelles: Westinghouse Mechanical & Power Operated Signalling (one 1930 and one 1922 reprint): Railway Signal & Permanent Way Pocket Book: GWR Automatic Train Control 1931: GWR black Folder with Instructions For Rig Of Pole notes: GWR General Appendix: GWR Signal Dept Structure Gauge 1933 Linen Plan - Straight Road: Various other Pamphlets, Plans and Circulars pertaining to Signalling.