[4] In July 1943, Crump married Eileen Hilda Wallace, a theatre sister at Rotorua Public Hospital, at Trinity Presbyterian Church, Cambridge.

[8][9] A bank officer, Crump served with the 2nd New Zealand Expeditionary Force during World War II.

[10] He embarked as a second lieutenant with the first echelon,[10] and saw active service in Greece, Crete, Egypt, and Libya, before being invalided home in mid 1942.

[5][11] Promoted to the rank of captain, he then served as adjutant at the Raventhorpe Convalescent Depot in Bombay.

[13] Crump's swimming costume and bronze medal from the 1934 British Empire Games are held in the collection of the Museum of New Zealand Te Papa Tongarewa.