Voleurs De Nuit Sahara Algerien Eugene Fromentin (1820-1876)

The picture has something of this: cavalry, mammal, people, seated, moon, dust, herder, outdoors, astronomy, sky, woman, exploration, landscape, group.
Perhaps it’s a painting of a group of men and horses in a field with a sky full of stars and a man kneeling down next to a white horse.