Oil painting of river landscape by John O' Brien Inman (American 1828-1896). John O'Brien Inman was born in New York in 1828, studied with his father (Henry Inman), and painted primarily portraits and seascapes; 25" w., 15" h. Oil painting of river landscape by John O' Brien Inman (American 1828-1896). John O'Brien Inman was born in New York in 1828, studied with his father (Henry Inman), and painted primarily portraits and seascapes; 25" w., 15" h.