There is a Samuel Lowry that passed away on July 15, 1886 at age 40 (so, being born around 1846) in Carleton County,Ontario, that may be him.

There is a Samuel Lowry (near the other Lowrys) in Fitzroy in the 1871 census. If this is him, he is living with his sister Ossy, next door to Hamilton and other Lowry’s.