I Suppose that most of us are familiar with the processes by which necks of land are cut down, by which promontories are turned into peninsulas, and the peninsulas into islands, while the islands in their turn become rocks. I have elsewhere called attention to all stages of the process as shown in the four corners of Sark. On the south there is the Coupee causeway, an isthmus 200 feet above sea-level, with a crest only some six feet in width; on the north, an isthmus yet lower, and parts beyond already being separated by the sea; on the west, an island, Breqhou; on the east, rocks, the Burons. There are to be seen all stages of the process, but does that process always proceed through all those stages to the end?