Thirty six sectioned drawings of various piston aero engines drawn by Lyndon Jones, the majority, but by no means all, of Rolls-Royce/Bristol manufacture, covering the period from World War 1 till the late 1940s. Nearly all the drawings also have a cut-away drawing of the main aircraft powered by the engine concerned. 77 large landscape format pages, ring bound in a paper cover. Rolls-Royce Heritage Trust.