INDIA BY IMPERIAL AIRWAYS Artist: W.H.A. Constable Circa 1935 A Handley Page H.P. 42, 'Hannibal', flying over an Indian city on the banks of a busy river. On a door at the back of the aircraft just after the registration is a Royal Mail emblem. This was the door to a special compartment for mail bag storage. In 1934 the government announced plans for the All-Up Empire Mail scheme. This was to mean that letters for any part of the Empire would be sent by air automatically.