In 1903, Vincent joined the
Foreign Office Judicial service. In that year, he was appointed
Magistrate in
Kisumu,
British East Africa. In 1905, he appointed Second Assistant Judge in
Zanzibar. With effect from April 1906, he was appointed Assistant Judge for the British Court for Siam in
Bangkok. In 1908, he was appointed Acting Assistant Judge of the
British Supreme Court for China in Shanghai while the Judge of the Court
Havilland de Sausmarez was on sick leave. He served in that position for one year. He met his future wife travelling from Shanghai to San Francisco. He returned to Zanzibar as Acting Assistant Judge briefly from October 1909 to January 1910, when he resigned from Foreign Office service. ==Later life==