Darn those transcribers, ancestry needs to ge them glasses.In 1880 Isaac and Angeline are in Palmer Hamden MA as Gengras, (e not i). Her parents are living with them.
1910 in Burlington young Isaac and Delia Gengras with Wilford, Eva, Sarah and John
You know the more I look into this I think there is a problem because there seems to be another Isaac in Canada married to an Angeline with sons Wilfred and Isaac and the stats don't match as to dates and birth places. If you work backward from your family can you directly link through the Burlington line or in other words are you sure about the Canadian marriage for Isaac and Angeline Roberts.