(Licentiate of Trinity College London), who was active in Adelaide 1920-1950 He was a son of Alfred R. F. Sierp (ca.
He studied at the School of Arts and Crafts and dominated the 1928 Examinations, when he sat for 11 technical drawing subjects, passing with Honours in eight and a Credit in three.
He worked as a draughtsman in the State public service, then the Education Department, becoming South Australia's first Inspector of Art.
He was involved in stage design and set painting for amateur theatricals.
Allan married Catherine Lillias "Kitty" Rowe (1907–2002) on 18 April 1931.