Switzer - wife of Philip Drader

I am trying to find the name of the wife of Philip Drader born 1827 in Marysburg, Prince Edward County, Ontario, Canada and died after 1871.He was the son of John Drader from his first wife, who was supposed to be a Switzer. As far as I have been able to find out, John married in 1826 and the Switzer lady died in 1827 when Philip was born.I have not been able to find anything further about Philip's mother.Switzer, All My Father's Were has a note that Philip Switzer had "several daughters not listed".If anyone can help me, I would appreciate it.Thank you.