Gaspé peninsula

I'm looking for information about my great-grandfather on my mother's side, who was Norwegian. Born (in Quebec or abroad?) in 1851. Orphaned and adopted by a French-Canadian family. His name in Quebec : Pierre-Jean Savoie. His "real" name that I heard mentioned was Sadler (could Jo-Ann Sadler tell me if her name is of Norwegian extraction?). How should I go about finding more info about him? I read that there was a failed attempt at establishing a Norwegian settlement at Gaspé around 1860. Where could I find more info about that? I'll be spending one month in Oslo in March as a visiting professor and would have liked to take that opportunity to find out more about my Norwegian roots.