One of Four Portraits of Horses James Seymour (1702-1752)

The picture has something of this: cavalry, people, horse, seated, rider, lid, equestrian, mammal, saddle, cowman, action energy, mare, horseback, bridle, beach, cowboy, leisure, run, wear, dressage.
Perhaps it’s a painting of a man riding on the back of a brown horse in a field with a blue sky and clouds in the back ground behind him.