Hello, I realize this is 6+ years later but still searching.
James McPhee is my gggrandfather. I know Alice M. she is about 5 generations from James 1758 as am I. I had my DNA tested and the Haplotype is I1b where the John McPhees are R1b. this leads me to believe McPhee was not the name they were born with. John's wife could have been married to some one else (James and Catherin's father) and due to the termoil in Scotland Highlands their name wasn't healthy. I am grabimg at straws but the "brick wall" is thick. I was thinking maybe McMillan. I have hired Genealogists and they were stumped also. I don't know when Catherine came to America and if she was married at the time. The letter was written from Glengarry Ontario and sent to James in Hants County, Nova Scotia. when the revolutionary war started they probably left New York and moved to English terratory. Any help is appreciated.
Thank you, William McPhee