'Grand Shaft Barracks Dover': site map. Reference tables. Compass indicator. Zincographed and printed at the School of Military Engineering, Chatham, under the direction of Lieutenant L Darwin, Royal Engineers; corrected to 1892. MS title: 'Index to the plans shewing present appropriation': coloured MS additions form a graphic index to items (18-19) and (21-23); MS reference note on dimensions and construction materials; additions made by W Mumford, 6 August 1896; signed by Colonel G W C O'Brien (on the staff of the Commanding Royal Engineer, South-Eastern District), Dover.