[Volume of ms. drawings: Track plans of electrical and mechanical signalling systems in use at LNER stations, sidings and junctions in Lincs. and Notts. / Harry Marsh. 1930s. Contains 79 double-page plans in ink and colour, each with detailed key, sometimes on separate page(s). Inside fron cover is stuck Diploma of Membership certifying Harry Marsh (of Retford) was elected Associate Member of the Permanent Way Institution on 14 Nov 1931. LNER Permanent Ways 1931-1940