Hello StevieSteve,
Would some handsome helpful chap be going to Kew in September? And if he was, might he be willing to look up James Coubrough in the RA muster rolls? I know he was in Halifax, Nova Scotia, in Sept 1851, because he was married there Sept 23, and he was in St. John, New Brunswick, in Jan/Feb 1854 because his son Matthew was christened there. The last notice I had before that was the 1841 census, when he was 10, a tearer in a calico printing factory in Thornliebank, Renfrewshire.
Happy hunting,
Geneeeus