Be careful about deciding which census is correct and which is not; we do not know who actually gave the info for each one or how accurate the census taker was. Same with church records. That's why we have to accumulate so much documentation until we either come up with a concensus or find something truly trustworthy. Since we have not found Thomas Alexander Ewart's birth or baptism, judging whether he was born in Quebec or Ontario cannot be done accurately at this time, nor can who his parents were. I have several family stories that say his parents were George/Jessie and his obit says he was born in Ontario but those are all after-the-fact and are not documentation. Have you found George and Jessie (Tulley) Ewart on an early census with their children at home?
Margaret King Ewart's obit says she was born in Vaughn Twp, York Co., Ontario.
I have pics of some Paul tombstones and my husband knew some of them well; he spent a summer with some in Michigan.
Actually, the Mount Calvert Cemetery is a double-named cemetery. There is a fork at the entrance and the sign over the right entrance says Mount Calvert while the sign over the left entrance says Plympton Wyoming Enniskillen. This latter would be the side the clan is "technically" buried on instead of the Catholic side though they are the same cemetery.
This is getting too involved to continue on the message board. If there's anything else please contact me via my email address that I sent you last week.