The Wellesley Grey Arabian led through the Desert Jacques-Laurent Agasse (1767-1849)

The picture has something of this: cavalry, horse, mammal, seated, equestrian, stallion, equine, animal, mare, action energy, two, farm, camel, bridle, run, people, livestock, motion, gallop, race.
Perhaps it’s a painting of a white horse being led by a man in a green headdress and.