Donna and Frances - Many thanks to both of you for your very interesting replies many months ago. They spurred me on to learn more about the IOM, military, Hannah Bullock etc etc.
Another query is raised, however. We know that most of the family left the IOM at varying stages to attend school, marry, etc - so who would have organised the MIs to Dorothea Juliana Blood (nee Ingram) and Neptune Blood, who both died many years later, and in Ireland? Do you know how we could find this out?
Another daughter, Dorothea, married Thomas Foulerton-Grant 25 March 1816 (1817 another source) at the Isle of Man. As I haven't been able to find them beyond that point so far, perhaps they stayed there?
Yet another daughter, Mary Juliana, married George Gillkrest in 1825 at IOM, according to Burke's Irish Family Records. The same could apply, although George's son appears in Australia at the time of the NSW goldrushs in the early 1850s.
I promise to be a better (more polite, especially) respondent, next time...

Jann Gallen
(catching up after another computer breakdown, virus attack(s), family crises and local govt kafuffle)