Centaurs Et Centauresses S-Exercant Au Tir De L-Arc Eugene Fromentin (1820-1876)

The picture has something of this: people, mammal, tree, water, group, outdoors, two, recreation, daylight, dog, cavalry, wear, child.
Perhaps it’s a painting of a group of people in a wooded area with a mountain in the background and a body of water in the foreground with animals.