Darby was born in
Lowestoft, England, and remained proud to be British throughout his life. His parents were Percy Charles Darby, estate agent, and his wife Jessie, née Ainslie, a branch secretary of
Shop Assistants Union. He trained at
Portsmouth Teachers College before taking a job as steward and
galley hand on a
P&O liner and in that role visited Australia in 1926. He migrated to Australia in 1928 and trained as a teacher at
Sydney Teachers' College, after which he taught in country and city primary schools in
New South Wales in the years 1930-45. After the outbreak of
World War II in 1939, Darby attempted to enlist in the
Second Australian Imperial Force but was rejected because of
myopia. Instead, having studied at the
University of Sydney and having graduated with a
Bachelor of Economics in 1938, he was seconded from primary teaching to the Youth Section of the Federal Department of Labour and Industry, to work as a vocational officer. Darby went on to found the British Orphans' Adoption Society (BOAS) which "sought to bring British war orphans to Australia for legal adoption." From June 1940 to January 1941, the Society sent 2,000 pounds in weight of warm clothing to England. Dame
Enid Lyons, the widow of former
Prime Minister Joseph Lyons, Professor F.A. Bland, Darby's economics professor, and Sir Arthur Rickard, owner of Sydney's largest real estate company, became BOAS patrons. ==Political career==