caption: The image shows a black and white engraving of a triangle with a man holding a sword in one hand and a skeleton in the other, set against a black background. The triangle is believed to be a representation of the alchemical symbol, which is a triangular shape with a pointed top and a curved bottom. The man is wearing a long robe and has a stern expression on his face, while the skeleton is standing in front of him with its arms outstretched.