Lord Portmore Watching Racehorses at Exercise on Newmarket Heath John Wootton (1682-1764)

The picture has something of this: people, cavalry, group, seated, man, mammal, lithograph, transportation system, child, herder, recreation, woman, hut, camel, weapon.
Perhaps it’s a painting of a group of people riding on the backs of horses next to a building and a person sitting on the ground in front of the painting.