I don't have any info on that O'Brien family, but the Hynes family lived in Millview, Lot 49 up until recently, there are still descendants in the area. On the Island Register (www.islandregister.com) 1863 Lake Map they show up as Haynes and are sometimes spelled Hines. The O'Brien name may be there, I don't know, but you could check the on-line directories and census records on that site.I have a picture of the family of Alfred J. Hynes of Millview from a community history I co-wrote.The original homestead is gone now but a small bungalow the family built is on the property, now lived in by someone unrelated. I can look them up in the archives too if you like, though it the first mention of an O'Brien family living there I have seen. Most of the Catholics in Lot 49 kind of spilled over from neighboring Vernon River and its church, St Joachim's.