caption: The image shows a portrait of a man with long curly hair, drawn on a paper with some text at the bottom. The man is believed to be Sir Isaac Newton, as indicated by the text which reads "Sir Isaac Newton". He is wearing a white shirt and a black vest, and has a serious expression on his face. His hair is long and wavy, and his eyes are focused intently on something in the distance. His hands are clasped in front of him, and he has a slight smile on his lips.