caption: The image shows an old map of the British Isles from the 15th century, depicting the extent of the island of Guernsey. It is a detailed map, showing the various geographical features of the area, such as rivers, mountains, and cities, as well as the various bodies of water that make up the island. The map is filled with intricate details, including mountains, rivers, and other geographical features. The colors used are mostly shades of blue and green, with some yellow and red accents.