Thank you for your immediate and helpful replies. My question did relate to a military context and topic 842376.0 was a thread that I started 12 months ago. I still haven't managed to trace any record of John MacDonald HEICS, hence my question. The link to the militaryarchivesresearch.com is interesting, as it suggests that there are more sources of HEICS Army records that I have been aware. I'll try to investigate further.