Capt Augustine Francis
Marlowe RNAS got Aviators' Certificate №2180 with a Grahame White Biplane at RNAS Chingsford on December 17, 1915. Referenced
here.
The Graham White Type XV (or Admiralty Type 1600) does not match with the Challenge picture, as this machine was never fitted with a four-wheel landing gear and the tail rudder was double and of different form.
References in: J.M. Bruce. British aeroplanes 1914-1918.
Cheers
Kees