Group at the Cottage, Bournehill John Christian Schetky (1778-1874)

The picture has something of this: tree, people, outdoors, daylight, group, grass, landscape, wear, mammal, sky, scenic, cavalry, man, cropland, leisure.
Perhaps it’s a painting of a group of people sitting on a lush green field next to a large white house with a lake in the middle of the background.