The successes of the republic at sea and in their distant enterprises were continual, and in some instances brilliant. Brazil was gradually falling into the power of the West India Company. The East India possessions were secure. The great victory of Van Tromp, known by the name of the battle of the Downs, from being fought off the coast of England, on the 21st of October, 1639, raised the naval reputation of Holland as high as it could well be carried. Fifty ships taken, burned, and sunk, were the proofs of their admiral's triumph; and the Spanish navy never recovered the loss. The victory was celebrated throughout Europe, and Van Tromp was the hero of the day. The king of England was, however, highly indignant at the hardihood with which the Dutch admiral broke through the etiquette of territorial respect, and destroyed his country's bitter foes under the very sanction of English neutrality. But the subjects of Charles I. did not partake their monarch's feelings. They had no sympathy with arbitrary and tyrannic government; and their joy at the misfortune of their old enemies the Spaniards gave a fair warning of the spirit which afterward proved so fatal to the infatuated king, who on this occasion would have protected and aided them.
In an unsuccessful enterprise in Flanders, Count Henry Casimir of Nassau was mortally wounded, adding another to the list of those of that illustrious family whose lives were lost in the service of their country. His brother, Count William Frederick, succeeded him in his office of stadtholder of Friesland; but the same dignity in the provinces of Groningen and Drent devolved on the Prince of Orange. The latter had conceived the desire of a royal alliance for his son William. Charles I. readily assented to the proposal of the states-general that this young prince should receive the hand of his daughter Mary. Embassies were exchanged; the conditions of the contract agreed on; but it was not till two years later that Van Tromp, with an escort of twenty ships, conducted the princess, then twelve years old, to the country of her future husband. The republic did not view with an eye quite favorable this advancing aggrandizement of the House of Orange. Frederick Henry had shortly before been dignified by the king of France, at the suggestion of Richelieu, with the title of "highness," instead of the inferior one of "excellency"; and the states-general, jealous of this distinction granted to their chief magistrate, adopted for themselves the sounding appellation of "high and mighty lords." The Prince of Orange, whatever might have been his private views of ambition, had however the prudence to silence all suspicion, by the mild and moderate use which he made of the power, which he might perhaps have wished to increase, but never attempted to abuse.
On the 9th of November, 1641, the prince-cardinal Ferdinand died at Brussels in his thirty-third year; another instance of those who were cut off, in the very vigor of manhood, from worldly dignities and the exercise of the painful and inauspicious duties of governor-general of the Netherlands. Don Francisco de Mello, a nobleman of highly reputed talents, was the next who obtained this onerous situation. He commenced his governorship by a succession of military operations, by which, like most of his predecessors, he is alone distinguished. Acts of civil administration are scarcely noticed by the historians of these men. Not one of them, with the exception of the archduke Albert, seems to have valued the internal interests of the government; and he alone, perhaps, because they were declared and secured as his own. De Mello, after taking some towns, and defeating the marshal De Guiche in the battle of Hannecourt, tarnished all his fame by the great faults which he committed in the famous battle of Rocroy. The duke of Enghien, then twenty-one years of age, and subsequently so celebrated as the great Condé, completely defeated De Mello, and nearly annihilated the Spanish and Walloon infantry. The military operations of the Dutch army were this year only remarkable by the gallant conduct of Prince William, son of the Prince of Orange, who, not yet seventeen years of age, defeated, near Hulst, under the eyes of his father, a Spanish detachment in a very warm skirmish.
Considerable changes were now insensibly operating in the policy of Europe. Cardinal Richelieu had finished his dazzling but tempestuous career of government, in which the hand of death arrested him on the 4th of December, 1642. Louis XIII. soon followed to the grave him who was rather his master than his minister. Anne of Austria was declared regent during the minority of her son, Louis XIV., then only five years of age; and Cardinal Mazarin succeeded to the station from which death alone had power to remove his predecessor.
The civil wars in England now broke out, and their terrible results seemed to promise to the republic the undisturbed sovereignty of the seas. The Prince of Orange received with great distinction the mother-in-law of his son, when she came to Holland under pretext of conducting her daughter; but her principal purpose was to obtain, by the sale of the crown jewels and the assistance of Frederick Henry, funds for the supply of her unfortunate husband's cause.
The prince and several private individuals contributed largely in money; and several experienced officers passed over to serve in the royalist army of England. The provincial states of Holland, however, sympathizing wholly with the parliament, remonstrated with the stadtholder; and the Dutch colonists encouraged the hostile efforts of their brethren, the Puritans of Scotland, by all the absurd exhortations of fanatic zeal. Boswell, the English resident in the name of the king, and Strickland, the ambassador from the parliament, kept up a constant succession of complaints and remonstrances on occasion of every incident which seemed to balance the conduct of the republic in the great question of English politics. Considerable differences existed: the province of Holland, and some others, leaned toward the parliament; the Prince of Orange favored the king; and the states-general endeavored to maintain a neutrality.
The struggle was still furiously maintained in Germany. Generals of the first order of military talent were continually appearing, and successively eclipsing each other by their brilliant actions. Gustavus Adolphus was killed in the midst of his glorious career, at the battle of Lutzen; the duke of Weimar succeeded to his command, and proved himself worthy of the place; Tilly and the celebrated Wallenstein were no longer on the scene. The emperor Ferdinand II. was dead, and his son Ferdinand III. saw his victorious enemies threaten, at last, the existence of the empire. Everything tended to make peace necessary to some of the contending powers, as it was at length desirable for all. Sweden and Denmark were engaged in a bloody and wasteful conflict. The United Provinces sent an embassy, in the month of June, 1644, to each of those powers; and by a vigorous demonstration of their resolution to assist Sweden, if Denmark proved refractory, a peace was signed the following year, which terminated the disputes of the rival nations.
Negotiations were now opened at Munster between the several belligerents. The republic was, however, the last to send its plenipotentiaries there; having signed anew treaty with France, by which they mutually stipulated to make no peace independent of each other. It behooved the republic, however, to contribute as much as possible toward the general object; for, among other strong motives to that line of conduct, the finances of Holland were in a state perfectly deplorable.
Every year brought the necessity of a new loan; and the public debt of the provinces now amounted to one hundred and fifty million florins, bearing interest at six and a quarter per cent. Considerable alarm was excited at the progress of the French army in the Belgian provinces; and escape from the tyranny of Spain seemed only to lead to the danger of submission to a nation too powerful and too close at hand not to be dangerous, either as a foe or an ally. These fears were increased by the knowledge that Cardinal Mazarin projected a marriage between Louis XIV. and the infanta of Spain, with the Belgian provinces, or Spanish Netherlands as they were now called, for her marriage portion. This project was confided to the Prince of Orange, under the seal of secrecy, and he was offered the marquisate of Antwerp as the price of his influence toward effecting the plan. The prince revealed the whole to the states-general. Great fermentation was excited; the stadtholder himself was blamed, and suspected of complicity with the designs of the cardinal. Frederick Henry was deeply hurt at this want of confidence, and the injurious publications which openly assailed his honor in a point where he felt himself entitled to praise instead of suspicion.
The French labored to remove the impression which this affair excited in the republic; but the states-general felt themselves justified by the intriguing policy of Mazarin in entering into a secret negotiation with the king of Spain, who offered very favorable conditions. The negotiations were considerably advanced by the marked disposition evinced by the Prince of Orange to hasten the establishment of peace. Yet, at this very period, and while anxiously wishing this great object, he could not resist the desire for another campaign; one more exploit, to signalize the epoch at which he finally placed his sword in the scabbard.