Thoroughbred with Jockey Up ATN Edmund Charles Tarbell

The picture has something of this: cavalry, horse, equestrian, mammal, seated, equine, mare, stallion, rider, animal, bridle, mane, racehorse, gallop, saddle, race, thoroughbred, grass, fast, dressage.
Perhaps it’s a painting of a man riding on the back of a brown horse on a lush green field next to a tree and a large body of water.