The image shows a portrait of a man, depicted from the chest up. He is slightly turned to his left but looks straight ahead with a serious expression. The man has neat, light-colored short hair styled back. He is wearing formal attire, including a double-breasted coat over a collared shirt with a white cravat. There are no visible accessories or objects. The background features an oval frame against a plain surface and includes an engraving notation at the bottom with details about the work, including the name "Robert Thornton, M.D." and publishing information from August 1, 1809.