John Corbet, Sir Robert Leighton and John Kynaston with their Horses and Hounds Francis Sartorius

The picture has something of this: cavalry, seated, people, mammal, man, horse, lid, wear, equestrian, rider, two, cowman, military, saddle, competition, recreation, herder, group.
Perhaps it’s a group of men riding on the backs of brown and white horses next to a white and black dog and two white and brown spaniel puppies.