An Interesting Collection of Ephemera and Photographs Relating to Air Ships, including eight large photographs, an Admiralty Air Department Specifications to the Engineer Officer revised to 26.1.17, a confidential set of lecture sheets on the Clerget 110 H.P. Engine, a Ministry of Munitions list of technical pamphlets, diagrams etc available dated 10 March 1918, a handbook on the 220 H.P. Renault Engine, a small album of real photographic and printed postcards and twelve stereoscopic cards