It’s best to start off saying that in the Regency era, a horse’s breed often went unremarked. There also could be confusion about a horse’s breeding since records might not be well kept, or gossip just got the facts wrong. Even Wellington’s favored mount, Copenhagen, was sometimes noted as being half-thoroughbred when it was his dam, Lady Catherine, who was a half-bred mare but was entered into the General Stud Book (started in 1791). Copenhagen was sired by Meteor, a son of the great...
