Sam was an excellent horseman - possibly as good as Alex.
He was an excellent horseman, and rode as if he were part of the horse.
As they looked down the street they saw a horseman coming.
He is an excellent horseman, you know.
When disturbed they go off at a swift trot, which soon leaves all pursuit from a man on foot far behind; but if chased by a horseman they break into a gallop, which they can keep up for some distance.