Stephen,
Sorry for the delay, not done much family history recently.
My g-g-g-grandfather Robert Stott married Emily Haslett (Essex 1827) in Dublin, 1857. her father was a soldier, John Haslett. We found his army records, he was born in 1786 in Belfast, joined army in 1806, gave his occupation as "clerk".
Pretty certain that he was married to Catherine, and probably had at least two sons John ~(Southampton 1829) and Henry (Limerick 1833). Quite feasible that he had another son in 1844.