Hi Lazarus
I have moved this to Armed Forces main board - new and best home for this thread

Which list did you find him listed on at Forces War Records? What else did it say?
Looking at what people have suggested so far - Have you checked FindMyPast for the James Wyatt listings there?
And - aghadowey suggested birth certificates of the children born in Belfast as these often give Regiment and Rank details for serving soldiers. Do you have any of these?
Milly