Hi,
Sorry I stumbled on this accidently just now. One of my Chisholm people settled in Jamaica, just can remember who it was. Leave it with me and I will look back in my ancestry and see if I can track him down. There was a lot of Chisholm migration to the Americas, Australia and New Zealand around that time, with a purging of the clans, but I haven't heard of many heading to Jamaica. Maybe you have already found them by now :)
Terry