Robert Gwillym of Atherton and His Family Arthur William Devis (1712-1787)

The picture has something of this: people, wear, recreation, woman, cavalry, man, veil, child, group, togetherness, royalty, wedding, girl, leisure, military, home, two, outdoors, enjoyment.
Perhaps it’s a painting of a family posing for a picture in front of a large white house with a large tree in the foreground.