 By the time of his appearance at King John's (Baliol) first parliament in February 1293 he was chancellor of Glasgow Cathedral.He seems to have been sent abroad for further study by Bishop Robert Wishart of Glasgow, probably in the year or two before July 1295.The Lamberton surname is recorded in one source as having a close association with the ancient Barony of Kilmaurs, Ayrshire and the Lands of Lambroughton.