1917 'Siddeley Puma' British aero engine, 250-hp - Royal F… | Flickr
Reid Gas Engine Co Siddeley Puma 240 B.H.P. 1917 Instruction Handbook — Essco Aircraft
Siddeley Puma - Wikipedia
File:Siddeley Puma 250 hp L'Année Aéronautique 1920-1921.jpg - Wikimedia Commons
The de Havilland / AIRCO DH.9 two seater tractor biplane designed and built by The Aircraft Manufacturing Co. Ltd., Hendon, London, N.W.9. – Engine 250 h.p. Siddeley "Puma". Speed at 10,000ft., 110