The ruins mentioned by Sir Walter are also visible at the present day, though in an even more dilapidated state than when he saw them. They are situated in a hollow, towards the south-east end of the island, probably near the spot where the monastery stood. They are doubtless the remains of St. Adrian's Chapel, which continued to be visited by pilgrims long after the destruction of the monastery itself. The space within the walls measures about 32 feet in length and 15 feet in breadth. In the west wall are two windows, of which the semi-circular interior openings seem to indicate Norman work, and suggest the thirteenth century as the date of the building. There are also remnants of windows both in the south and in the north wall. A shapeless gap near the southern extremity shows the position of the door. Just within it there may still be seen what is perhaps a fragment of the holy-water stoup. From the fact that the ruins lie north and south, it has been thought that the chapel occupied only a part of the building, and duly lay east and west within it. If such were the case, it must have been of exceptionally small dimensions, and have contained a very diminutive altar. At the present time no attempt seems to be made to prevent the venerable relic from falling further into decay; and the rough enclosure within which it stands is used as a sheep-pen. The lighthouse now on the May is situated close to the old tower. It is a massive quadrangular stone building surmounted by a square tower which at a distance gives it the appearance of a church. It first came into use on the 1st of December, 1886. For fifteen years previously the Commissioners of the Northern Lights had been anxious to establish an electric light on the Scottish coast; but it was not till 1883 that the Board of Trade was able to sanction the expenditure, and suggested its introduction at the Isle of May, on the ground that "there was no more important station on the Scottish shores, whether considered as a landfall, as a light for the guidance of the extensive or important trade of the neighbouring coast, or as a light to lead into the refuge of the Forth". The new buildings, engines, electric machines and lamps cost £15,835; but, including old material which it was found possible to utilize, the total installation was estimated at £22,435. As to technical details, it may suffice to mention that the generators are two of De Meritens's alternate-current magneto-electric machines, weighing about four and a half tons each. The engines are a pair of horizontal surface-condensing steam engines, each with two cylinders 9 inches in diameter and 18 inches stroke, making 140 revolutions per minute. There are two steam boilers, of which only one is in use at a time. Each of them is 20 feet long and 5 feet 6 inches in diameter. Only one of the three electric lamps is used at a time, and is changed once an hour to allow it to cool. The light is about 25,000 candle-power, but when seen