Alfred James Munnings – Portrait of Lady Barbara Lowther on Horseback Sotheby’s

The picture has something of this: cavalry, mammal, seated, horse, people, two, equestrian, veil, wear, transportation system, motion, woman, saddle, lid, man.
Perhaps it’s a painting of a woman riding on the back of a brown horse on a lush green field with a blue sky and white clouds in the background.