William Sextie was born in 1848.
Throughout his career he concentrated mainly on equestrian subjects and, particularly, upon the racehorse. His work is notable for its precise and almost photographic accuracy, partly because the contemporaneous invention of photography created a standard of accuracy which he tried to recreate in his own paintings.
His best-known racehorse portraits include Geheimniss with Tom Cannon Up, (Tom Cannon was the great-grandfather of jockey Lester Piggot), Shotover, (the Derby winner of 1882), Cherry with Fred Archer up (which featured one of the greatest jockeys of all time), and Saucebox (painted for J. Parr Esq.).
Sextie died in 1887.