- ^ Who was Who 1987-1990: London, A & C Black, 1991, ISBN 0-7136-3457-X
- ^ "Douglas, Gerald Wybergh (DGLS894GW)". A Cambridge Alumni Database. University of Cambridge.
- ^ "Ordinations: Lincoln", The Times, 30 May 1899, p13.
- ^ Cambridgeshire History
- ^ National Archives
- ^ "Deaths", The Times, 31 December 1934, p1.