3. Cromwell in Ireland. 1649-1650.—To Cromwell such a situation was intolerable. His Puritan zeal led him to regard with loathing Ormond's league with the Catholics, and he was too thorough an Englishman not to resolve that, if there was to be a struggle, England must conquer Ireland, and not Ireland England. On August 15 he landed at Dublin. On September 11 he stormed Drogheda, where he put 2,000 men to the sword, a slaughter which was in strict accordance with the laws of war of that day, which left garrisons refusing, as that of Drogheda had done, to surrender an indefensible post, when summoned to do so, to the mercy or cruelty of the enemy. Cromwell had a half-suspicion that some farther excuse was needed. "I am persuaded," he wrote, "that this is a righteous judgment of God upon those barbarous wretches who have imbrued their hands in so much innocent blood; and that it will tend to prevent the effusion of blood for the future—which are the satisfactory grounds to such actions, which otherwise cannot but work remorse and regret." At Wexford, where the garrison continued to defend itself after the walls had been scaled, there was another slaughter. Town after town surrendered. In the spring of 1650 Cromwell left Ireland. The conquest was prosecuted by his successors, Ireton and Ludlow, with savage effectiveness; and when at last, in 1652, the war came to an end, a great part of three out of the four provinces of Ireland was confiscated for the benefit of the conquering race. The Catholic landowners and other persons who had borne arms against the Parliament were driven into the wilds of Connaught, to find there what sustenance they could.
4. Montrose and Charles II. in Scotland. 1650.—In 1650 Cromwell's services were needed in Scotland. In the spring, Montrose reappeared in the Highlands, but was betrayed, carried to Edinburgh, and executed as a traitor. On June 24 Charles II. landed in Scotland, and, on his engaging to be a Presbyterian king, found the whole nation ready to support him. Fairfax declined to lead the English army against Charles, on the plea that the Scots had a right to choose their own form of government. Cromwell had no such scruples, knowing that, if Charles were once established in Scotland, the next thing would be that the Scots would try to impose their form of government on England. Cromwell, being appointed General in the room of Fairfax, marched into Scotland, and attempted to take Edinburgh; but he was out-manœuvred by David Leslie (see p. [549]), who was now the Scottish commander, and, to save his men from starvation, had to retreat to Dunbar.
5. Dunbar and Worcester. 1650-1651.—Cromwell's position at Dunbar was forlorn enough. The Scots seized the passage by which alone he could retreat to England by land, whilst the mass of their host was posted inaccessibly on the top of a long hill in front of him. If he sailed home, his flight would probably be the signal for a rising of all the Cavaliers and Presbyterians in England. The Scots, however, relieved him of his difficulties. They were weary of waiting, and, on the evening of September 2, they descended the hill. Early on the morning of the 3rd, Cromwell, crying "Let God arise; let His enemies be scattered," charged into their right wing before the whole army had time to draw up in line of battle, and dashed them into utter ruin. Edinburgh surrendered to him, but there was still a large Scottish army on foot, and, in August 1651, its leaders, taking Charles with them, pushed on into England, where they hoped to raise an insurrection before Cromwell could overtake them. On they marched, with Cromwell following hard upon their heels. Fear kept those who sympathised with Charles from rising, and, at Worcester, on September 3—the anniversary of the battle of Dunbar—Cromwell absolutely destroyed the Scottish army. Those who were not slain were taken prisoners, and many of the prisoners sent as slaves to Barbadoes. "The dimensions of this mercy," wrote Cromwell, "are above my thoughts. It is, for aught I know, a crowning mercy." He spoke truly. Never again was he called on to draw sword in England. Charles succeeded in making his escape to France, on one occasion concealing himself amidst the thick leafage of an oak, whilst his pursuers rode unwittingly below.
A coach of the middle of the seventeenth century: from an engraving by John Dunstall.
6. The Navigation Act. 1651.—Ever since the days of James I. there had existed a commercial rivalry between England and the Dutch Republic, and disputes relating to trade constantly arose. Latterly these disputes had been growing more acute. Early in 1648 Spain came to terms with the Dutch by acknowledging their independence, and, later in the same year, the Thirty Years' War in Germany was brought to an end by the Peace of Westphalia, though war between France and Spain still continued. Henceforth religion was no longer made the pretext for war on the Continent; and States contended with one another because they wished either to annex territory, or to settle some trade dispute in their own favour. In 1650 the Stadholder, William II.—the son-in-law of Charles I.—died, and the office which he held was abolished, the government of the Dutch Republic falling completely under the control of the merchants of the Province of Holland, in which were situated the great commercial ports of Amsterdam and Rotterdam. The Dutch had got into their hands the carrying trade of Europe. In 1651 the English Parliament passed the Navigation Act, to put an end to this state of things. English vessels alone were to be allowed to import goods into England, except in the case of vessels belonging to the country in which the goods which they carried were produced.