Portrait of James Longsdon John Hoppner (1758-1810)

The picture has something of this: people, portrait, wear, jacket, outerwear, cravat, leader, man, engraving, mustache, facial expression, royalty, necklace, side view, writer.
Perhaps it’s a close up of a painting of a man in a black suit with a white collar and white hair wearing a black jacket and a white tie.