The origin of the title Knight of Glin, or Knight of the Valley, seems not to be accurately known, but the designation has been recorded as in use during the reign of Henry III. The Knights of Glin, also called the Black Knights, belong to the great Geraldine family, and owed a certain allegiance to the Earls of Desmond, which is described as follows: “Divers customs of meat and drink, together with rising of men at the Earl’s calling to the number of 60 kearne.”

The housing and feeding of some of the Earl’s men were also included.

Glin is a small market town and seaport in the Barony of Shanid, in the County Limerick, at the junction of a rivulet with the Shannon, twenty-six miles west by south of Limerick City.

Of the ancient fortress situated in the town, nothing now remains but the keep. It measures 38 feet by 35 externally, and the walls are 8 feet in thickness. It is at present about 40 feet in height, but was at one time crowned by a turret in the eastern corner. The courtyard walls were 102 feet in length and 92 in breadth. The chief entrance, to the north, was defended by a semicircular outwork. The great hall was situated on the western side of the courtyard, while the keep was in the south-west corner. The two eastern angles were defended by small towers. A moat surrounded the castle filled with water from the Shannon tributary.

The Knight of Glin was a very important chieftain in Limerick, maintaining an ordinary force of ten horsemen and a hundred and forty foot soldiers. During the Desmond wars he shared the fortunes of the Earl, and in 1569 both the Knight and the son were attainted, the latter being executed.

The estates were, however, very shortly afterwards restored, and in the rebellion of the Northern Earls and the “Sugan Earl” of Desmond, the Knight of Glin was again amongst the disaffected.

In the summer of 1600 Sir George Carew started on an expedition to the west to restore peace in that quarter. He had with him a force of one thousand five hundred men, and was accompanied by the Earl of Thomond.

The army marched through Kerry to Askeaton, where there was a halt for four days awaiting provisions, which had been sent by water from Limerick. On the 4th of July they marched twelve miles to Ballintare, the enemy moving in front within view. The next morning’s march brought them before Glin Castle, the rebels still offering no opposition.

The Four Masters describe the route taken as having been from Limerick along the northern bank of the Shannon through Clare, the troops ferrying themselves across the river at Glin, but it is most likely that Sir George Carew’s biographer gives the correct line of march.

Captain Gawin Harvey’s ship, with the ordnance on board, had been anchored in the Shannon for fourteen days awaiting their arrival, and the guns were at once unshipped upon the arrival of the troops.

That night the forces entrenched themselves between the castle and the river, and the next day, under the guise of a parley, they managed to plant the cannon without opposition.

The next day the Knight of Glin, who was not within the castle, asked for a safe conduct to the English camp, which was granted. Upon arrival he demanded to see the President, but was refused unless upon an unconditional surrender. This he would not consent to, and was, therefore, ordered to depart. Seeing his son in the camp, whom he had delivered as a hostage some time previously, he seemed to hesitate, but as he still held out for terms the Earl of Thomond broke off the negotiations, and the Knight and his attendants retired to a neighbouring hill to watch the attack.

Later the Constable of the fortress sent a message to the Earl of Thomond begging an interview, which was granted. He began by stating that the love he bore the Earl, being a Thomond man himself, had induced him to warn the English to depart, as the Earl of Desmond with three thousand Connaught men were only two miles off, and would most likely attack the camp and drive them all into the river. The Earl laughed at his forebodings, and told him to deliver the castle and so save himself and the warders from death. This offer he refused, and the President, hearing he had done so, sent a message to say that he hoped to place his head on a stake in two days’ time.

One of the cannon becoming clogged, Sir George Carew ordered it to be filled with a charge in inverted order and the fire put to the mouth, so as to clear the touch-hole by the explosion. This was carried out with great success, much to the relief of the besiegers.

A fire of small shot was kept up from the castle at the ordnance, and the President, placing the Knight’s son on one of the cannon, sent a message to the garrison to say he had given them a mark to aim at. The Constable replied that the Knight of Glin might have more sons, and that the child should not deter him from firing.

Sir George Carew, however, removed the child, and commenced the battery. A breach was made into the cellar under the great hall, one gunner only being killed.

Captain Flower then led the attack and entered the hall through the breach, forcing the ward to retire. The flag of the besiegers was hoisted from the turrets of the hall, and night coming on Captain Slingsby was ordered to hold the position until the morning.

A dropping fire was kept up all night. The Constable, seeing that to successfully hold the castle was impossible, tried to escape with some of the warders, but he and others were killed in the attempt, one only getting away. His head was placed upon a stake in the camp as the President had said.

The rest of the garrison retired to the keep. In the morning the attackers burned the heavy wooden door which guarded the stairway, but they had to wait two hours for the smoke to clear away. As soon as it had done so, one of the garrison appeared to ask for the lives of his comrades if they surrendered, but it appears he gave himself up before an answer was returned.

The officers and men then ascended the stairs in single file as the width of the passage necessitated, but met with no opposition, the garrison having retired to the battlements, which were protected only by one door.

Here a terrible hand to hand encounter took place. Some of the warders were killed, while the rest jumped from the parapet into the water below, and were either drowned or killed by the guards stationed beneath the tower.

The English lost ten soldiers and one ensign, while about twenty-one men were wounded. Of the defenders of the castle about eighty men were killed, while the Four Masters state that some women and children also lost their lives. They remark that the place would not have been so easily won had not the “Earl of Desmond’s people dispersed from him.”

The rebels had burned the town of Glin upon the approach of the Royal troops.

During the rising the castle had been used as a storehouse for the “Sugan Earl’s” forces, and a Limerick merchant called Anthony Arthurs seems to have dispensed his goods from it.

Sir George Carew placed a guard of twenty-one soldiers in it under the command of Captain Nicholas Mordant.

Edmund FitzGerald, Knight of the Valley, was restored to most of his estates in 1603, and six years later he appealed to the Lords of the Council against Patrick Crosby obtaining Glin Castle by the King’s letter, on the pretext that it was kept from the Knight to prevent his rebelling. Crosby had undertaken to repair and fortify the fortress at his own cost. The Knight stated he had been pardoned by Lord Mountjoy, that his lands had been restored, and shortly afterwards the castle as well.

The next year Sir Arthur Chichester explains that the building was occupied only by Anthony Arthur, who sold wines in it, and that he had therefore given it to Crosby. He also stated that the Knight’s eldest son was abroad.

In 1681 the castle was in the possession of Major FitzGerald.

The present Glin Castle, seat of Desmond FitzJohn Lloyd FitzGerald, Knight of Glin, is situated about a mile west of the town. Over the yard gate is an engraved stone bearing the following inscription: “Edmond Gerrald, Knight of the Vally. Onnor Cartie, his wife. Fear God always and remember the Poor. I.H.S. Anno Domoni, 1615.”