He designed the first Coinage of the Republic of Ireland in 1928. He was responsible for the design of the George Cross in 1940, particularly the head of King George VI on it; and was involved in the design of the Great Seal of the Realm. He produced designs for coinage of several countries including Ireland and Australia. He produced an interesting portrait of King George V late in his reign which was used as the obverse for coins of Australia, Fiji, Mauritius, New Zealand and Southern Rhodesia.