It's been quite some time since you posted, but I just found this. I hope we can still connect.
My ancestors, William Graham m Eliza Jackson (an orphan, born in London c1840; sometimes known as Eliza Chance/Chantz), lived in the Bogton seigneury in the mid-1860s to late 1870s.
Eliza probably lived in the vicinity before marrying John Ferry c1857 and moving to the US. After Ferry's death (c1863), she married William Graham. It is believed that William (born Ireland) was there from c 1841.
Any chance your research has uncovered Eliz?