Robert Spelman Robertson (1870-1955) was a lawyer and judge, and the chief justice of Ontario from 1938 to 1952.
Born in Goderich, Ont., Robertson was called to the bar in 1894. He entered private practice in Stratford, Ont., but in 1917 was recruited to join the Fasken law firm, which was found in Toronto in 1863. He became a prominent civil litigator, one of William Lyon Mackenzie King's favourite litigators in constitutional cases.
He was elected a bencher of the Law Society of Upper Canada in 1930 and was treasurer of the Law Society of Upper Canada in 1937 and 1938, until he was appointed the chief justice. Source: Wikipedia