Stewart's early life is unclear. He appears to be the son of William Stewart of Livingstone, but the evidence is uncertain. He joined the army some time after the
Glorious Revolution, but his early military career is also obscure. He probably served with the
Scots Greys, and may have been the Captain John Stewart ‘of Galloway’ who joined Brigadier-General William Stewart's regiment in 1695. The first confirmed fact of his military career is that in 1707 he became a Lieutenant-Colonel in the regiment newly raised by Alexander Grant. From 1708 he served in Flanders with the
Duke of Marlborough, returning periodically to Scotland, where he had been elected in 1708 at the
first general election to the new
Parliament of Great Britain. In a contest assisted by his opponent being jailed as a suspected
Jacobite, Stewart was returned as the MP for
Kirkcudbright Stewartry. Returning to Scotland two years later for the
1710 election, he was captured from his ship by a French
privateer. Released on parole, he was re-elected in the Stewartry, but negotiations with the French proved slow and he was not fully cleared until late 1711. Re-elected in
1713, Stewart was classified as a
Whig. He was not a very active member of the
House of Commons, and stood down at the
1715 election. He had gone to half-pay in the army in 1713. == Death ==