Portrait of Erasmus Darwin (1731-1802) Joseph Wright of Derby (1734-1797)

The picture has something of this: people, portrait, man, wear, winter, jacket, lid, Christmas, sweater, elderly, facial expression, cap, knitwear, music, outerwear, jewelry band, outfit, cold.
Perhaps it’s a painting of a man in a brown coat sitting at a table with his hand on his chin and his right hand resting on his other hand.