In the solid masonry of the platform is the fuel-store; over this is the great hall, twenty-two feet square with an arched roof twenty feet high. On this floor are also two wardrobes and other conveniences. Over the hall is the king’s apartment, twenty-one feet square, with an elliptical roof twenty feet in height. This floor has also a vestibule, two wardrobes, &c. The third floor contains the chapel, in which a priest occasionally performs mass. Its diameter is twenty-one feet, and from the floor to the centre of the dome-roof the height is forty feet. It is highly adorned with mosaic, and is lighted by eight lantern windows. In the crown of the dome-roof is a circular opening surrounded by a balustrade, through which is seen the ornamental roof of the room above. This room is fourteen feet in diameter and twenty-seven feet high; it is used as a watch-room by the light-keepers, and was probably intended as a place to which they could be admitted to hear prayers or mass on the occasion of a royal visit. Over this room is an apartment capable of containing a stock of fuel sufficient for one night’s consumption, and is so constructed as to be convertible into a room for the exhibition of a light, in case of accident or repairs being required in the main light-room. This is situated over the store-room just referred to, and is surrounded by a balcony and a circular stone parapet. The original lantern, or light-room, was constructed for the combustion of oak wood, exposed in a kind of chauffer raised six feet above the floor. The room was not glazed, so that the smoke was carried out sideways in the direction of the wind. The roof was furnished with a sort of chimney in the shape of a spire, which terminated the building with a ball. The whole light-room was of stone, and its height to the top of the spire-funnel was thirty-one feet.