The Barnum Family calls him G. Pliny Barnum. Some sources also spell his given name as Salmatious.
In the 1850 US Census for Alden, Erie County, New York the family of Salmasius Barnum was enumerated as follows:
Dwelling #376; Family #389
Salmasius P. Barnum, 35, M, Farmer, Real property, $300, b. Vermont
Odell Barnum, 25, F, b. New York
Grove Barnum, 2, M
Daniel Warner, 23, M, Farmer, b. Germany
He was buried in the Cowlesville Village Cemetery, located north of Cowlesville on Lapp Road in the Town of Bennington.