The name is supposed to be derived from a small islet near to the eastern bridge where the heroic wife of a great chief is buried, and which was called Enis-Cethlenn or “the Island of Cethlenn.” The castle stands at the western side of the town, where it commanded the lake. It is now incorporated with the Castle Barrack, but the original quadrangular keep (a storey lower than in former times) is still to be seen, while the curtain wall and towers, which were erected in 1611, and figure in the arms of the town, are in a good state of preservation. The ditch which once surrounded it has now been filled up. The castle was the chief fortress of the Maguires, lords of Fermanagh. In 1439 it was surrendered to Donall Ballach Maguire, and three years later Thomas Oge Maguire gave it to Philip Maguire. In 1593 Maguire had the houses round the castle burnt for fear of attack. Nevertheless, early the following year, during his absence, Captain Dowdall laid siege to the fortress. On the ninth day he attacked the castle “by boats, by engines, by sap, by scaling.” He placed 100 men in a great boat covered with hurdles and hide, which, with [Illustration: ENNISKILLEN CASTLE.] Connor O’Cassidy as guide, drew up close to the wall of the barbican. Here a fierce onslaught was made, and the garrison retreated to the keep. This, Captain Dowdall threatened to blow up unless they surrendered, which they accordingly did. The steersman of the boat gives the number as thirty-six fighting men, and nearly the same of women and children; whereas Captain Dowdall states he put a hundred and fifty to death, which is most likely an exaggeration. He says it came into her Majesty’s hands with small loss, though it was very strong, with walls seven feet thick and “soundrie secret fights within it of great annoyance uppon the barbican.” He remained ten days mending the breaches, gates, and doors, and laid in three months’ provisions. He elected a constable, and, garrisoning it with thirty soldiers, took his departure. Marshall Bagnall was on his way to ward the castle, but Dowdall reported that he was too ill to await his coming. The same year Maguire laid siege to the fortress, it is said, at the instigation of the Earl of Tyrone. The relieving party was defeated, and the Lord Deputy himself set out to the rescue of the garrison. They had been reduced to eating horseflesh, and had only one more animal when they were relieved. The ward was then reduced from forty to thirty, and the castle victualled for six months, which supply was to be augmented by fishing for eels under the walls.