During his period of army service, Douglas Green’s unit of the Royal Australian Survey Corps travelled between Darwin, Brisbane and the Torres Strait Islands, charting towns and waterways. The data they collected was vital for the war effort — in some cases, there had been no mapping of these regions since Matthew Flinders’s charting of the Australian coast in the early 1800s. Much of the unit’s time was spent on the Atherton Tableland, as virtually no maps of this area existed. During this period, Green found time to sketch, producing hundreds of watercolours and pen-and-ink drawings. Draughting room was shown in the ‘Servicemen’s Work’ exhibition, held at the Athenaeum Gallery, Melbourne, in 1944.