This is a vintage black and white engraving on a cream-colored background. The image is divided into two main sections: a geometric diagram at the top and a scene of a duel at the bottom. The top section features a regular heptagon (a seven-sided polygon) constructed with dashed lines. The heptagon is centered on the page, and its vertices are connected to the center, creating a star-like pattern. To the right of the heptagon is a scale labeled 'Eschelle de 120 Toises' and 'Schoole van 100 Roeden'. The scale is marked with numbers and lines, indicating measurements. The bottom section depicts a duel between two men. They are dressed in 17th or 18th-century clothing, including breeches, coats, and feathered hats. They are engaged in a sword fight, with swords raised and poised for attack. A small dog is present in the background, seemingly observing the duel. The scene is rendered with detailed lines and shading, typical of engravings from that era. To the left of the heptagon is the text 'PLAN DUN HEPTAGONE REGULIER'.