the link I posted is not my family just shared as looking for a James Sullivan born 1833, I believe his father was with him on the reservation when they stayed with the Denis family. He married Joseph Denis's daughter Henriette (Hattie) Denis she was born in Canada in 1835/1837 . Hattie died 4 Nov. 1897 in Norwood ,N.Y.
http://www.bytown.net/sullivanwilliamjohnatbearbrook.htmthe link above has great info on all your queries I think.