"The corners and doorcases of the guard-towers, the buttresses, window-frames, and several parts of the main tower, are constructed with red freestone; but all the other parts of the walls which in general are about six or seven feet in thickness, are formed of round stones collected from the adjacent shores. The inside of the walls has been constructed with small stones, and plenty of fluid mortar to fill the interstices. "To this mode of construction, to the excellent binding quality of the stones, and to the slow drying of the grout-work in the inside, may be attributed the great tenacity of the walls of this fabric, more than to any uncommon or unknown method of composing the mortar. "The roofs of the numerous guard-houses in the surrounding walls of this castle have apparently been flat. Upon these, and along the walls, which in most castles were topped by a parapet and a kind of embrasure called crennels, the defenders of the castle were stationed during a siege, and from thence discharged arrows, darts, stones, and every kind of annoyance they could procure, upon their enemies. "There were often subterraneous passages leading from the lowest part of the main tower to a great distance; and by these the besieged could make their escape in time of imminent danger, when the outworks were carried by storm. "On the north-east side of the outworks of this castle has been a large pond or reservoir for supplying the ditches with water in cases of sudden emergency. There has also been a fish-pond on the north-west side. "Though many variations were made in the structure of castles, as the plan was often modified by the architect according to the site occupied by the edifice, yet the most perfect and magnificent were generally constructed with all the different parts we have mentioned. "The walls contain no decorations of art, and are equally destitute of all natural embellishments; the rugged outlines of dilapidation, associating with the appearance of past magnificence, are the qualities which chiefly interest the imagination, while comparing the settled tranquillity of the present with the turbulent ages that are past, and contemplating the view of this mouldering fabric. "The island of Fouldrey has certainly been much larger at the erection of the castle than it is at present; but the sea, having reduced it to its present small compass, has abated the rapid career of its destruction. It now wastes the western shore of Walney, and forms a new tract out of the ruins, which proves a barrier to its progress upon the Peel of Fouldrey, and at some future period may be an accession to this island, in place of the land which it has lost." The period when it was reduced to ruins is not well ascertained, but it is probable that this was one of the fortresses which fell under the dismantling orders of the Commonwealth. The port is very large and commodious, and would float a first-rate ship of war at low water.