It was on the 13th of August that Harry with his force joined the army of Ormonde, and the next day the news came that Cromwell had landed at Dublin, and had issued a bloodthirsty proclamation against the Irish. Harry was at once ordered to march with his regiment to Tredah, now called Drogheda, a seaport about forty miles north of Dublin. At this town Harry found in garrison twenty-five hundred English troops, under the command of Sir Arthur Ashton, an old Royalist officer, he had lost a leg in the king's service.

During the six months he had passed in the West Harry had found Mike an invaluable servant. He had, of course, furnished him with decent suits of clothes, but although willing to wear shoes in the house, nothing could persuade Mike to keep these on his feet when employed without. As a messenger he was of the greatest service, carrying Harry's missives to the various posts as quickly as they could have been taken by a horseman. During that time he had picked up a great deal of English, and his affection for his master was unbounded. He had, as a matter of course, accompanied Harry on his march east, and was ready to follow him to the end of the world if need be.

The garrison of Drogheda employed themselves busily in strengthening the town to the utmost, in readiness for the siege that Cromwell would, they doubted not, lay to it. In September Cromwell moved against the place. He was prepared to carry out the campaign in a very different spirit to that with which he had warred in England. For years Ireland had been desolated by the hordes of half-savage men, who had for that time been burning, plundering, and murdering on the pretext of fighting for or against the king. Cromwell was determined to strike so terrible a blow as would frighten Ireland into quietude. He knew that mildness would be thrown away upon this people, and he defended his course, which excited a thrill of horror in England, upon the grounds that it was the most merciful in the end. Certainly, nowhere else had Cromwell shown himself a cruel man. In England the executions in cold blood had not amounted to a dozen in all. The common men on both sides were, when taken prisoners, always allowed to depart to their homes, and even the officers were not treated with harshness. It may be assumed that his blood was fired by the tales of massacre and bloodshed which reached him when he landed. The times were stern, and the policy of conciliating rebels and murderers by weak concessions was not even dreamed of. Still, no excuses or pleas of public policy can palliate Cromwell's conduct at Drogheda and Wexford. He was a student and expounder of the Bible, but it was in the old Testament rather than the new that precedents for the massacre at Drogheda must be sought for. No doubt it had the effect at the time which Cromwell looked for, but it left an impression upon the Irish mind which the lapse of over two centuries has not obliterated. The wholesale massacres and murders perpetrated by Irishmen on Irishmen have long since been forgotten, but the terrible vengeance taken by Cromwell and his saints upon the hapless towns of Drogheda and Wexford will never be forgotten by the Irish, among whom the "curse of Cromwell" is still the deadliest malediction one man can hurl at another.

Cromwell's defenders who say that he warred mildly and mercifully in England, according to English ideas, and that he fought the Irish only as they fought each other, must be hard driven when they set up such a defense. The fact that Murrogh O'Brien, at the capture of Cashel, murdered the garrison who had laid down their arms, and three thousand of the defenseless citizens, including twenty priests who had fled to the cathedral for refuge, affords no excuse whatever for the perpetration of equal atrocities by Cromwell, and no impartial historian can deny that these massacres are a foul and hideous blot in the history of a great and, for the most part, a kind and merciful man.

Upon arriving before Drogheda on the 2d of September Cromwell at once began to throw up his batteries, and opened fire on the 10th. His artillery was abundant, and was so well served that early the same afternoon two practical breaches were made, the one in the east, in the wall of St. Mary's Churchyard, the other to the south, in the wall of the town. Sir Arthur Ashton had placed Harry in command at St. Mary's Churchyard, and seeing that the wall would soon give way under the fire of the enemy's artillery, he set his men to throw up an earthwork behind.

Seven hundred of the Roundheads advanced to the assault, but so heavy was the fire that Harry's troops poured upon them that they were forced to fall back with great slaughter. At the other breach they were also repulsed, but attacking again in great force they made their way in. Near this spot was an ancient tumulus, called the Hill Mount. The sides of this were defended by strong palisades, and here the Royalists, commanded by Sir Arthur Ashton himself, opposed a desperate resistance to the enemy. These, supported by the guns on the walls, which they turned against the Mount, made repeated attacks, but were as often repulsed. The loss, however, of the defenders was great, and seeing that fresh troops were constantly brought against them they at last lost heart and surrendered, on promise of their lives; a promise which was not kept, as all were immediately massacred.

Up to this time Harry had successfully repulsed every attack made upon the other breach, but at length the news of the Roundheads' success at the Mount reached both assailants and defenders.

With exulting shouts the Roundheads poured over the wall. The garrison, headed by Harry and the other officers, strove hard to drive them back, but it was useless. Cromwell and Ireton were in the van of their troops, and these, accustomed to victory, hewed their way through the ranks of the besieged. Many of them lost heart, and, throwing down their arms, cried for quarter. With shouts of "No quarter!" "Hew down the Amalakites!" "Strike, and spare not!" the Roundheads cut down their now defenseless foes. Maddened at the sight, the besieged made another desperate effort at resistance, and for awhile fought so stoutly that the Roundheads could gain no ground of them.

Presently, however, a party of the enemy who had forced their way over the wall at another point took them in rear. Then the garrison fled in all directions pursued by their victorious enemy, who slaughtered every man they overtook. Mike had kept close to Harry through the whole of the struggle. He had picked up a pike from a fallen man, and had more than once, when Harry was nearly surrounded by his foes, dashed forward and rid him of one of the most pressing. Seeing, by the general slaughter which was going on, that the Roundhead soldiers must have received orders from their general to give no quarter, Harry determined to sell his life dearly, and rushed into a church where a score of the English soldiers were taking refuge. The door was closed and barricaded with chairs and benches, and from the windows the men opened fire upon the Roundheads, who were engaged in slaying all—men, women and children, without mercy. Soon, from every house around, a heavy fire was poured into the church, and several of those within fell dead under the fire. Under cover of this, the Roundheads attacked the door with axes. Many were killed by the fire of the defenders, but as the door yielded, Harry called these from their post, and with them ascended the belfry tower. Here they prepared to fight to the last.

Looking from a window, Harry beheld a sight which thrilled him with horror. Gathered round a cross, standing in an open space, were two hundred women on their knees. Even while Harry looked a body of Cromwell's saints fell upon them, hewing and cutting with their swords, and thrusting with their pikes, and did not desist while one remained alive. And these were the men who had the name of God ever on their lips! When the dreadful massacre began Harry turned shuddering from the window, and with white face and set teeth nerved himself to fight to the last. Already the door had been beaten down, and the assailants had streamed into the church. Then a rush of heavy feet was heard on the stairs. Assembled round its top stood Harry and the twelve men remaining. Each knew now that there was no hope of quarter, and fought with the desperation of men who cared only to sell their lives dearly. Fast as the Roundheads poured up the stairs, they fell, pierced by pike, or shot down by musket ball. For half an hour the efforts continued, and then the Roundheads, having lost over fifty men, fell back. Three times during the day the attack was renewed, and each time repulsed with the same terrible slaughter. Between the intervals the defenders could hear the never-ceasing sound of musket and pistol firing, as house after house, defended to the last by desperate men, was stormed; while loud, even above the firing, rose the thrilling shrieks of dying women and children.