Following out the principle of the Edystone Light-house in most of its details, the oaken trenail and wedge were used for fixing the stones, till the mortar took band, and a superincumbent weight was got upon them to prevent the sea from sweeping them away. These being also introduced into all the lower courses of the Bell Rock Light-house, a sufficient quantity was procured for the probable number of courses that might be built during the ensuing season. The precise lengths of the trenails and wedges could not be fixed, from the uncertainty of the granite quarries, which regulated the thickness of the courses of the building; but, for the present, the trenails were provided of the length of 2 feet, and 1¼th inch in diameter. The wedges were of the length of 18 inches, measuring 3 inches in breadth, 1 inch in thickness at the top, and tapering to ¼th of an inch in thickness at the point, as will be seen in Plate X. Figs. 10. and 11. But when we come to speak of the process of building, their respective uses will be described. [Sidenote: 1808, March.] [Sidenote: The writer visits the Bell Rock.] On the writer’s visit to Arbroath, in the end of March, he was anxious to land upon the Bell Rock, to ascertain the precise state of the Beacon, after the storms of the winter, that he might be enabled to judge of the propriety of converting it into a habitable place for the artificers during the working season. He accordingly sailed from Arbroath on the 30th current, at 1 A. M. in the Light-house Yacht. The wind was from E.NE., but the weather, though cold, was upon the whole favourable for the trip. At 7 the Floating-light was hailed, and all on board found to be well. It was now unfortunately too late in the tide for landing upon the rock this morning; and it became necessary to cruise about till the following day, there being at this season only one tide with daylight. In the mean time, in sailing round the rock, just as it was beginning to be covered with the tide, the base of the Beacon was distinctly seen between the rolling seas, which broke upon it; while at the top, the flag-staff proudly continued to surmount the whole. [Sidenote: Floating-Light.]