An instance occurred recently where one was wheeled against our grating after occupying a safe position for many years. Those that take up positions in the boat tracks are of course assailed at the earliest opportunity, an operation which generally entails a bit of submarine mining on our part. The reef consists of hard, red sandstone, arranged in irregular layers, with a dip of 15 degrees towards the south-east and extends in a north-easterly and south-westerly direction, having an area of about 500 yards by 100 yards considered dangerous to shipping. The north-east end, on which the Lighthouse is built, is slightly higher, and has an area of about 140 yards by 70 yards, the highest portions of which do not exceed 10 feet above the lowest tides. The geological formation of the Bell Rock is similar to that of the Redhead, in Forfarshire, and can be traced northward through Rossshire, while in the opposite direction the shores of Berwick present the same features, and continues as far as Cumberland. Soundings prove the existence of a ridge or shallower part of the sea bottom extending a considerable way in these directions, and as the adjacent coasts present ample evidence of the sea having at some remote period in the world’s history occupied a much higher level, the theory that the Bell Rock did not always occupy the isolated position it now does, but stretched continuously from the Red Head to Berwick, damming the waters of the Forth and Tay, appears highly tenable. Possibly our present day “Travellers” are, through some great seismic disturbance, wandering evidences supporting this theory.