I have looked very carefully at what I have. In fact I was wrong - James children were not born overseas, not one of them - it was some of his grandchildren who were born overseas. Apart from his oldest son Robert b 1797 in Stamford, Lincolnshire, all the others (including those who did not join up) were born in Great Baddow, Essex. I have the military records of the 5 who joined up and have gone carefully through them and there is no clue to parentage at all.
I am pretty sure his father (James Rowland's father) was a serving soldier. I think, but am not absolutely positive, his mother, Elizabeth (no maiden name) remarried in 1777 at All Saints Church, Stamford, Lincolnshire to a James Sutton Webster. He was a soldier - it does not give his regiment but I bet it was the same Regiment as James Rowland's father served in. I think, but am again not entirely sure, that he served in the 49th Foot which I believe became the Hertford Regiment at some stage. James Rowland and his wife, Elizabeth Joceylin (variable spelling) married in Hertfordshire and Elizabeth came from Essex.
You can see why I am so muddled and am grasping at straws - just don't know where to go next. Am wondering about the American War for James Rowland.
Sue