I also have been looking for family sailing from Ireland in 1851 on the "Hope" for Fort Malden. I am not sure if William and Mary Corr where relatives, but in church records they always had their children at the same time.
I am looking for John Carr (Kerr, Corr) and his wife Mary Anne McMullen. They came over with 1 son John about 5 years and possibly two younger children a son and daughter.
I would love to solve this. It will open so many doors.