O’Donovan, “Annals of the Four Masters.” MS. Ordnance Survey. Stokes, “Pococke’s Tour in Ireland in 1752.” State Papers. Carew MSS. Parliamentary Gazetteer. Blackley, “A Tour through Innishowen.” _GREENCASTLE, COUNTY DOWN_ Upon the northern shore of Carlingford Lough, in the Barony of Mourne, four and a half miles south-west of Kilteel, County Down, are situated the ruins of this castle. It is a very fine specimen of Norman architecture, and was erected soon after the landing of the first English settlers so as to secure communication between the Pale and the outlying district of Lecale, as well as to command the entrance to Carlingford Lough. At present the remains chiefly consist of the keep, which was a high rectangular building, with square towers at the angles. A winding stair in the south-west turret leads to the top. The stone floor of the great hall, measuring 70 feet by 40, is supported by arches which form vaults in the basement. The upper floors have disappeared, and were probably of wood. The traces of extensive outworks can be seen round the building. On the west side stands a house which is at present inhabited by a farmer, but which for many years formed the chief residence of the Bagnall family during the seventeenth and eighteenth centuries. The castle belonged to the Du Burgos or Burkes, Earls of Ulster, and in 1312 Sir Maurice, the son of Thomas, married Catherine, daughter of the “Red Earl” of Ulster, and the next day, being the 16th of August, Thomas, the 2nd Earl of Kildare, “a prudent and wise man,” married her sister, Lady Joan de Burgh, also in the castle. The Lady Joan had two other married sisters, one being the [Illustration: GREENCASTLE, COUNTY DOWN.] wife of King Robert Bruce, and the other Countess of Desmond. In 1335 there was an order to send six “balistas” to furnish “Viride Castrum,” or the Greencastle. The same year William de Logan was ordered to pay Henry de Maunderville 20 marks out of the rents of the late Earl of Ulster, which were in the King’s hands, on account of the minority of the heir. This reward was for De Maunderville having twice relieved the castle of Greencastle with men-at-arms when it was besieged by the “felons” of Ulster. It was again attacked by the Irish in 1343, and this time it was carried by storm and dilapidated, but was shortly afterwards restored. The late Constable, William de Doun, received pardon in 1356 for having seized and imprisoned Rosea, daughter of Richard Foy. During Henry IV.’s reign there was only one constable between the castles of Carlingford and Greencastle. It is reported that Stephen Geron received £20 a year for the guardianship of Greencastle and £5 for Carlingford. In 1403 John Moore, who was then constable, petitioned for a rise of salary, and he was granted £40 a year on condition he spent 10 marks of it on repairs. The amount was to be paid out of the rents of Carlingford, Cooley, and “le Mourne.”