In 1909, Alabaster left England to practice as a barrister in Hong Kong. In September 1913, he was admitted to practice before the
British Supreme Court for China in
Shanghai in a hearing whereby special dispensation he was allowed not to be present. Alabaster had been in Shanghai the week before his admission and was returning the week after. The Acting Judge,
FSA Bourne, was not in Shanghai when Alabaster was there so allowed his admission to be moved in his absence. In 1915, he appeared in the
United States Court for China As a barrister admitted to the
British Supreme Court for China, by courtesy, he was allowed to appear before the
United States Court for China. In 1913, Alabaster revised the Ordinances of Hong Kong He served on the Sanitary Board and during
World War I served as Deputy Cable Censor He received an
O.B.E. in 1918 for his services in connection with the Cable Censorate. He was appointed a
King's Counsel in Hong Kong in 1922 and was said to be described by the legal profession as a "very sound lawyer" ==Legal Appointments==