Johan Adam von Gertten (1767-1835), governor of Strömsholm, colonel, landscape painter Aleksander Lauréus (1783-1823)

The picture has something of this: cavalry, people, mammal, seated, two, wear, veil, man, woman, sword, lid, weapon, cowboy, cape.
Perhaps it’s a painting of a man in a military uniform standing next to a horse in a wooded area with a dog on the other side of the painting.