#15233 Paul-Camille Guigou (1834-1871)

The picture has something of this: water, beach, landscape, seashore, sea, lake, sky, river, ocean, outdoors, reflection, tree, nature, island, scenic, rock, people, recreation.
Perhaps it’s a painting of a man and a dog on the shore of a body of water with mountains in the distance and people in the water in the foreground.