John William Casilear (June 25, 1811 – August 17, 1893) was an American landscape artist belonging to the Hudson River School.
Casilear was born in New York City. His first professional training was under prominent New York engraver Peter Maverick in the 1820s, then with Asher Durand, himself an engraver at the time. Casilear and Durand became friends, and both worked as engravers in New York through the 1830s.
Source: Wikipedia
