Portrait of William Westley James Millar (1735-1805)

The picture has something of this: portrait, man, people, wear, jacket, model, fashion, music, facial expression, pants, tie, retro, indoors, outerwear, dark, boy, menswear, business.
Perhaps it’s a close up of a painting of a man wearing a suit and tie with his hands on his chest and holding a suitcase in his other hand.