pieces still seemed to adhere closely, yet they were sufficiently open to admit moisture into the heart of the walls, which, in these stormy and exposed situations, is forced through the building: hence it is, that houses built with _drift_-stones of this description, are said by the cottagers of these islands to keep out moisture much better when built with _puddle_ or clay, than with the best lime-mortar, which, under certain circumstances, is known to attract moisture, while the clay resists it. But after all the care that can be taken in building with these slaty stones, even when taken fresh from the quarry, they still have a tendency to split into lamellæ, after they are built in the walls. Experienced builders, therefore, generally lay the outward stones of such walls with a slight inclination downwards, or _dip_, as the workmen term it, the more readily to prevent the admission of wetness. I have been thus particular, because it is hardly possible to prevent walls built of these materials from drawing moisture, until they have been _rough cast_,--an operation which is so very troublesome, from requiring to be occasionally renewed, that I have found it necessary, in these exposed situations, to build the outward walls double, as the only effectual method of obtaining a comfortable house free of dampness. [Sidenote: Laying the foundation stone of Beacon.] The weather continued to be so extremely boisterous here, that it was the middle of the month of May before a sufficient stock of materials was laid down for commencing the building at the Start Point. A wish having been expressed by the workmen, to have the foundation-stone of the Beacon laid with masonic ceremony; and considering the dreary prospect which the artificers had before them, the author was the more willing to embrace so fair an opportunity of affording them the enjoyment of a little convivial happiness. The influx of so many strangers to the island of Sanday for this work, and the novelty of the intended ceremony, made the news soon find its way to every house. Preparations were accordingly made;--the year of our Lord 1802, was cut upon the foundation-stone, in which a hole was perforated for depositing a glass phial, containing a small parchment scroll, setting forth the intention of the building; the official constitution of the Commissioners of the Northern Light-houses; and the name of their Engineer. It also contained several of the current coins of George III. in gold, silver, and copper. The day fixed for the ceremony was the 15th of May. The weather was dry and tolerably agreeable, though cold, with snow upon the ground; the thermometer by Fahrenheit’s scale indicating 35° in the shade at noon. A number of the principal inhabitants, and a crowd of cottagers assembled. Things being arranged for the ceremony, the author, assisted by Mr James Cleghorn, foreman for the works, applied the square and plummet-level to the