 He made the first exhibition of the platypus at the Moore Park Zoological Gardens (moved and renamed Taronga Zoological Gardens in 1917) in 1910, and with Ellis Stanley Joseph he took the first live platypuses to be seen outside Australia to the United States in 1922.He was also the first person to successfully keep a baby platypus in captivity.His interest extended to the other monotremes, the echidnas, and he made a film showing the habits of both monotremes.