I don't know who your Jacob is but I do know that some of the children of Jacob and Mary Martin Stover of Lancaster Co., PA went to Canada.YOu might try tracking down Christian and Ester Martin who died by 1852 who left grown children Henry, Hiram, Mary, Magdalena, and Ester. Also Moses and Nancy Weaver went to Canada.
They had brothers Henry[b. 1802], Jacob, Martin, and Peter.I am pretty sure Henry and Jacob both died in PA, but I don't know what happened to Martin and Peter.
Hope these are some clues for you to follow up on. The few dates I have make it look like a long shot, but you never know. Brenda