 He was a member of that court from 1921 to 1946 and presided it 1928–30.Notably, in the 1923 "Wimbledon case", he was the only PCIJ judge to ever vote against a suit brought by the government of his own country.He became a foreign member of the Royal Netherlands Academy of Arts and Sciences in 1936, and was elected a Foreign Honorary Member of the American Academy of Arts and Sciences in 1938.