Dear Elizabeth: Thank you for the responce. It was a romantic notion the grandfather and his brother married sisters. My Issabella was born 10th Oct. 1864 in Airdrie and died February 1940 in Hamilton Ontario. For Margaret Black I only have a marriage date of 1st January 1904 to Stewart Chambers at Uddinton , Blantyre , Lanark , Scotland. Although dates for your Issabelle don't line up with that of my grandmother your date of birth on Margaret would make her 21 in 1904 When my Margaret was married . If your Margaret married Stewart Chambers in 1904 we have a match . If any more info comes my way I'll let you know . Thanks again .T.F.