some Hishon were very early settlers of Albion, but they later moved.
I have followed another family, the Eedy from Cork who first moved to the Gore, and then in 1842, when the Canada Company made their rules easier to lease and buy land in the "Huron Tract", part of the family moved to the Huron Tract, meaning Biddulph, along with many neighbours.
At a guess, it is quite possible that a similar situation happened with the Hishon. Especially given that Cornelius died in May 1841 and his widow remarried a Fitzpatrick, they would not have been included in the move of the rest of the Hishon family to Perth County. They probably stayed behind with the Fitzpatrick.
The Hishon leased land from an early date (which I am trying to figure out) and the lot was split with Ann Hishon, Cornelius and James McDonnell.
In fact, this is a very typical Irish settlement pattern, with one male coming first, settling, etc and then other members of the family including elderly parents arriving later, and then using the experience gained in settlement such as the Gore before moving as a group to a new settlement just opening up in the Bush.
The history of the settlement of the Toronto Gore township is filled with these families.
Some went to Biddulph, some went to Grey County, some went to Bruce, later they went to Michigan or out to Manitoba.
I'll look at the Township papers at AO, maybe I'll find something about the earliest lease.