A Bay Racehorse with Jockey Up James Seymour (1702-1752)

The picture has something of this: cavalry, seated, horse, mammal, people, equestrian, rider, bridle, saddle, jockey, horseback, equine, dressage, mare, stallion, wear, competition, two, racehorse.
Perhaps it’s a painting of a woman riding on the back of a brown horse with a yellow and white blanket on it’s back, in a grassy area with trees and blue sky in the background.