Well the reason I think there was a William Thomas in their family is because of family records not Census or other government records. I did see the 1900 Census that says by 1900 that they had had 4 children but only 3 were still living. Perhaps the child that died was William Thomas and therefore he never went to Canada. My family records say that William Thomas was born 14 June 1892. I do know they had another son who died right after the 1900 US Census at 2 years old, but his name was not Cornelius it was Clarence Russel. I found a death record and headstone for him. I just find it's interesting that there is no death record or headstone for the child that they did lose before the 1900 Census, since there is one for the one they lost just after. They actually went on to have 3 more sons and then a daughter for their youngest not another son. The part that I find weird is that I always heard growing up from my Mom (she also heard it growing up) that the 4 oldest sons went to Canada, and now it seems that the only one who went may have been George Calvin.