I'm in Florida now, so will try to answer your questions from memory.
John Fitzpatrick and Mary Hayes had 7 more children. Six daughters and a son. The four oldest were born in The Gore and the youngest three in Wisconsin. I feel they went to Wisconsin about 1855 and returned to Canada - West Wawanosh Twp. in 1861.
I don't know when Hishons arrived in The Gore but Mary and Cornelius were married in St. Patricks,September 13, 1836. I did find Hishons in St. Pauls Church, Toronto records (I believe) 1828.
I haven't been able to connect Cornelius to Patrick.
My Mom said her grandmother told her she was related to Stocks in Kinkora. A Mary Hishon married a Joseph Stock in The Gore and they later moved to Kinkora. I haven't been able to make the connection with them either. But I did notice they had similar family names.
By the way,some other families - Brophys, Forehans(Foran), Kings and a Bernard Fitzpatrick (John's brother) first settled in that area and then moved to West Wawanosh Twp, Huron County (St. Augustine parish)
I read the church records of St. Patricks church, The Gore and found them very helpful.