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At the 1964 general election, he was elected as Member of Parliament (MP) for South Angus where the family seats of Gardyne Castle, Finavon Castle and Middleton all stood.
Although not a trained archaeologist, he directed excavations at Kildrummy Castle, Coull Castle, Kindrochit Castle, Doune of Invernochty, Esslemont Castle, Dundarg Castle and Finavon Castle.