[2] During World War I, Bustard served in the Royal Army Medical Corps in Greece and Italy.
[4] During World War II, Bustard served in the Citizen Military Forces developing camouflage at RAAF bases.
He was posted to Gayndah and Townsville where he disguised the appearance of Inland Aircraft Fuel Depots to look like farms.
[3] In order to make a living, he undertook a range of artistic work, including teaching and commissions.
[5][6] He drew pictures for advertisements, including for: His stained glass work can be found in: William Bustard died on 24 August 1973 in Southport, Queensland.