I just noticed you message and I thought that I would comment here rather than send a email to stimulate discussion. I have a theory. The Ardiel's were Huguenots from France. I have seen a record that John, Leonards younger brother, and their father fought in the 1798 rebellion. Given that he was protestant, he probabley fought for the British. I has seen numerous historic records of the Irish who fought in the rebelion and none of the pro-British. My theory goes like this. Ardiel is actually L'Ardilliare. They escaped France somtime in the 17th or 18th century. Ardiel is an uncommon name, even in Ireland and especially in the Tipperary area when you compare it with the Fitzgeralds and Powells and the rest who settled in London Township. I believe that the family had not been in Ireland too long before they decided to move on to Upper Canada. I suspect it had to do with the Rebellion. If we could find a roll of the British militia or regulars who fought in the 1798 Rebellion, I think we would be closer to finding some hard information.