The Stoutest Man In the Forty Twa appears in The Scottish Folksinger  (Norman Buchan & Peter Hall, Collins 1973/8); no author is named, but it's credited as "from the singing of John Strachan".  Pre- Ian Bruce, I should think.  Chords are given; I haven't tried to do this before -not being a guitarist- so I'll use the method described by Walter Corey, and elaborated on by Alan of Australia in the recent thread  Adding Chords to songs

Behold I am a soldier bold, and only twenty five years old  (G -C -G)
A braver warrior never was seen fae Inverness tae Gretna Green.  (C- G -C -G -D7)
When I was young my father said he wad pit me tae a decent trade,  (C -G -C -G)
But I didnae like that job at a', so I went and joined the Forty Twa.  (C -G -C -G -D7 -G)

Malcolm