Carol, Ian
Thank you so much for taking the time to reply.
Carol - I had a look on the county-Sutherland site, and it does look good. Haven't joined yet, but perhaps I will... This search isn't for my own forbears (who aren't from Sutherland), so not enough reason to join yet, but it does look like a really useful site. I tried looking at the MIs, but couldn't find one either - I just wasn't sure if you had access to more than what was on the website. thanks for checking!
Ian - I had seen that note about drowning in Ireland as well, but couldn't decide if it meant George had drowned, or his father. It's a bit ambiguous - I'll have a look at the Fencibles record, and see if I can find when they served in Ireland - might help identify which one it was. The pedigree on Ancestry is really interesting, although there don't seem to be any sources, so you're right about exercising caution. Still, it makes intriguing reading.
Thanks again for helping - this is the first time I've posted on here, so it's quite exciting to find people really answering!
Jo