File:Siddeley Puma 250 hp L'Année Aéronautique 1920-1921.jpg - Wikimedia Commons
The installation of the four Siddeley Puma engines in the fuselage of the Bristol Tramp, looking aft, Stock Photo, Picture And Rights Managed Image. Pic. MEV-10847330 | agefotostock
Reid Gas Engine Co Siddeley Puma 240 B.H.P. 1917 Instruction Handbook — Essco Aircraft