“The best basis for sound judgement is a knowledge of what has been done in the past, and with what results.”

Air Vice-Marshal J. C. Slessor (1897 to 1979)

Marshal of the Royal Air Force Sir John Cotesworth Slessor, GCB, DSO, MC, sometimes known as Jack Slessor, was a senior commander in the Royal Air Force, serving as Chief of the Air Staff from 1950 to 1952.