Russell John (1745 Guildford – 1806 Hull) – Georges de Ligne Gregory (1740-1822) (76x63 cm) 1793 J. Paul Getty Museum

The picture has something of this: people, portrait, facial expression, wear, elderly, man, woman, musician, outerwear, writer, recreation, music, furniture, indoors, leader, seat, jacket.
Perhaps it’s a painting of a man sitting in a chair with a hat on his left hand.