After moving west, he married a Cheyenne woman and had a son Edmund Guerrier in 1840.
Guerrier sent his son back East to St. Louis University while he and Ward continued their trading business with settlers.
Ward and Guerrier got the exclusive sutler contract for Fort Laramie in 1851.
Their practice of trading goods for the worn oxen of settlers is sometimes said to make them the first ranchers in Wyoming.
[2] He died when sparks from his pipe hit an open gunpowder keg.