In my search for my Campbell roots, I came across a Peter Campbell born in 1863, who was the son of John Alexander Campbell (possibly my great grandfather) and Sebria Grout. The Grouts were from around the West Hawksbury area known as the Ridge which was in close proximity of Breadalbane. Sebria must have died as John went on to marry Ann McGill of Vankleek Hill.
John Alexander Campbell may have been the father of my Grandpa Campbell, Alexander ("California") Campbell who was an illegitimate child born to Christine Mary MacLeod in 1852.
John Alexander was the son of Alexander Campbell b.1794 and Catharine MacLaurin b.1794 and who immigrated to Glengarry Co ON from PEI.
If this is relevant to your Peter Campbell, please let me know as it will also help me to verify my findings re the Campbell family. I am trying to trace their ancestry back to Scotland.