Thanks for responding. I'm catching up on making electronic records of my files so am not yet able to send details electronically.
I am a descendant of Hugh McCargar (1811 - 1875( ?)) and Elmina (1817-? -- that's the spelling that I am familiar with) through their daughter Margaret (1846 - 1902) who married Frank Wayland Vail (1843-1926).
Margaret and Frank had 10 children born in Canada and the US, of whom 4 lived to adulthood and old age. In fact, just a few weeks ago, I visited Margaret's and Frank's graves in Warren, Ontario, Canada, which is near Sudbury.
Frank and Margaret's daughter, Augusta Cynthia (1867-1966), m. Alex. MacPhail (1862-1940). Their daughter, (1895-1987) Ellen (Nellie) m. Charles Blair (1896-1982). Their daughter, Thelma Grace (1920-1991) m. John Tilton Gibson (1916-1996).
So that's where the Gibson comes into the line. I can provide further details and would also be interested in the lineage that you have.