Willsy - I am SO sorry!!!
I cannot believe I missed the Mellor link. Ann and John Mellor did, indeed have a son, George, whose birth was registered in 1879.
I do think that other members of the family may have gone to Canada and I do have a member of the Hart family checking things out for me in Canada. I think this is certainly further evidence of the link - thank you all so much. However, if anyone does come across anything else written down ......
Thanks again
Lisa