caption: The image shows a black and white engraving of a man in a black robe, holding a book in his hands. The man is believed to be Balthazar Gerber, as indicated by the text at the bottom of the image. He has a serious expression on his face and is wearing a long, dark robe with a high collar and cuffs. His hair is dark and his eyes are focused intently on something in the distance. His hands are clasped together in front of him, and his posture is upright and dignified.