 During the English Civil War, he fought in the Royalist cause at the Battle of Worcester (1651) in which he was severely wounded and might have been killed had it not been for his servant, James Cardno, who rescued him, saw to his recovery and returned him to his home at Fraserburgh.In 1669, Fraser served as commissioner for the visitation of the two colleges of Aberdeen.In 1670, his succession to the Lordship of Saltoun of Abernethy was ratified by King Charles II and confirmed by Act of Parliament.