Fred Mitchell was born Alfred St Michel or possibly Alfred Circe dit St Michel. He married Philomene Patenaude in Redford, Clinton, NY on 20 June 1858 (Pontbrian). I think his parents were Louis Circe dit St Michel and Louise Colin(?) dit LaLiberte. There is 20 May 1835 Baptism record for Alfred Circe St Michel in the Notre Dame Parish registers. I don't know when he died but his last child was born in Cadyville, NY in 1873.
I don't know if you have this - Lewis Tacy was Philomene's 3rd husband. She also married Francis Alexander in 1886.