Highlights of his record:
Enlisted in what looks like the 71st Highland Light Infantry/Regiment of Foot in 1818 at the age of 18. Says he's a weaver born in Barony (Glasgow).
He's assigned to the Stirlingshire Militia later in 1818, then rejoins the 71st from 1822 to 1828.
He deserted on 8 Nov. 1830 but it looks like he rejoined the same day. Gets a pay/service deduction and a couple months in prison for it. In 1837, he gets former service (and pay!) restored for good conduct by a secretary of war letter dated 15 July 1837. The letter mentions him and a Private George Gifford who deserted on the the same day.
Served 11 years 4 months in Canada (hospitalized in Lower Canada) and 2 years 10 months in Bermuda.
Discharge processed 14 June 1842 in Montreal, effective 13 Sept. 1842. It is prompted by several hospitalizations for fever and paralysis in St. Johns, Canada, in 1841 and 1842.
Barely legible pencil entry on the first page says Intends to reside at Peebles, Scotland, which is where I found him in the 1851 census.
So I'm hoping those who have more experience with British military records can point me towards what (if anything) I can do next, since I'm not finding any McMuns in Barony to connect him to
Many, many thanks!
BJ