He represented Forfarshire at the convention of estates, 1689, and in the parliaments of 1690, 1691, 1693, 1695, and 1696, and opposed the union.
He resigned his justiciary gown in 1744 and his office as an ordinary lord in 1753, and died 26 May 1758 in the eighty-fifth year of his age.
He is author of a little volume entitled 'Lord Dun's Friendly and Familiar Advices adapted to the various Stations and Conditions of Life,’ 12mo, Edinburgh, 1754.
His arguments on the doctrine of passive obedience were assailed the same year by Dr. Robert Wallace, minister at Moffat, who characterises Erskine as 'a venerable old man, of very great experience, and greatly distinguished for piety.'
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