1 April 1918: 2nd Lt
1 August 1918/20 januari 1920: Flying Officer
1 July 1926: Flight Lieutenant
1 February 1936: Squadron Leader
1 January 1939: Wing Commander
1 March 1941: Temporary Group Captain
2 May 1943: Acting Air Commodore
2 November 1943: Group Captain (W/S)
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