herring1 John Frederick Herring (1795-1865)

The picture has something of this: cavalry, horse, mare, mammal, animal, stallion, seated, equestrian, grass, equine, farm, field, mustang, pony, livestock, wildlife, mane, pasture, outdoors.
Perhaps it’s a painting of a man in uniform standing next to a brown horse in a grassy area with trees and a fence in the background and a man.