In Scotland, he'll have access to a skilled doctor when it gives him real trouble and, ahem, I need him to take his shirt off to be treated. I'm thinking of a musket-ball clipping the ribs, but other ideas would be most welcome.
Searched:
http://www.britishbattles.com/battle_fontenoy.htm
http://www.theroyalscots.co.uk/
Fontenoy: France dominating Europe by Denis Gandilhon
Tags here: 1740 – 1749; injuries to order (just the first forty or so because they made me feel rather ill and why do I keep writing this sort of fic?)