 Nicker served as Terry's guide, alongside Aboriginal cameleers, on his 1932 and 1933 expeditions which, under his influence, used camels only.These expeditions became the subject of Terry's book Sun and Sand (1937).In 1939 Nicker volunteered to enlist into World War II where, after a brief time at the Colchester Barracks, approximately from London, he met a local girl named Jane whom he married by special licence after a month of courtship.