Before finally leaving the Four Days' Fight, the conclusions of another writer may well be quoted:—
"Such was that bloody Battle of the Four Days, or Straits of Calais, the most memorable sea-fight of modern days; not, indeed, by its results, but by the aspect of its different phases; by the fury of the combatants; by the boldness and skill of the leaders; and by the new character which it gave to sea warfare. More than any other this fight marks clearly the passage from former methods to the tactics of the end of the seventeenth century. For the first time we can follow, as though traced upon a plan, the principal movements of the contending fleets. It seems quite clear that to the Dutch as well as to the British have been given a tactical book and a code of signals; or, at the least, written instructions, extensive and precise, to serve instead of such a code. We feel that each admiral now has his squadron in hand, and that even the commander-in-chief disposes at his will, during the fight, of the various subdivisions of his fleet. Compare this action with those of 1652, and one plain fact stares you in the face,—that between the two dates naval tactics have undergone a revolution.
"Such were the changes that distinguish the war of 1665 from that of 1652. As in the latter epoch, the admiral still thinks the weather-gage an advantage for his fleet; but it is no longer, from the tactical point of view, the principal, we might almost say the sole, preoccupation. Now he wishes above all to keep his fleet in good order and compact as long as possible, so as to keep the power of combining, during the action, the movements of the different squadrons. Look at Ruyter, at the end of the Four Days' Fight; with great difficulty he has kept to windward of the English fleet, yet he does not hesitate to sacrifice this advantage in order to unite the two parts of his fleet, which are separated by the enemy. If at the later fight off the North Foreland great intervals exist between the Dutch squadrons, if the rear afterward continues to withdraw from the centre, Ruyter deplores such a fault as the chief cause of his defeat. He so deplores it in his official report; he even accuses Tromp [who was his personal enemy] of treason or cowardice,—an unjust accusation, but which none the less shows the enormous importance thenceforth attached, during action, to the reunion of the fleet into a whole strictly and regularly maintained."37
This commentary is justified in so far as it points out general aims and tendencies; but the results were not as complete as might be inferred from it.
The English, notwithstanding their heavy loss in the Four Days' Battle, were at sea again within two months, much to the surprise of the Dutch; and on the 4th of August another severe fight was fought off the North Foreland, ending in the complete defeat of the latter, who retired to their own coasts. The English followed, and effected an entrance into one of the Dutch harbors, where they destroyed a large fleet of merchantmen as well as a town of some importance. Toward the end of 1666 both sides were tired of the war, which was doing great harm to trade, and weakening both navies to the advantage of the growing sea power of France. Negotiations looking toward peace were opened; but Charles II., ill disposed to the United Provinces, confident that the growing pretensions of Louis XIV. to the Spanish Netherlands would break up the existing alliance between Holland and France, and relying also upon the severe reverses suffered at sea by the Dutch, was exacting and haughty in his demands. To justify and maintain this line of conduct he should have kept up his fleet, the prestige of which had been so advanced by its victories. Instead of that, poverty, the result of extravagance and of his home policy, led him to permit it to decline; ships in large numbers were laid up; and he readily adopted an opinion which chimed in with his penury, and which, as it has had advocates at all periods of sea history, should be noted and condemned here. This opinion, warmly opposed by Monk, was:—
"That as the Dutch were chiefly supported by trade, as the supply of their navy depended upon trade, and, as experience showed, nothing provoked the people so much as injuring their trade, his Majesty should therefore apply himself to this, which would effectually humble them, at the same time that it would less exhaust the English than fitting out such mighty fleets as had hitherto kept the sea every summer.... Upon these motives the king took a fatal resolution of laying up his great ships and keeping only a few frigates on the cruise."38
In consequence of this economical theory of carrying on a war, the Grand Pensionary of Holland, De Witt, who had the year before caused soundings of the Thames to be made, sent into the river, under De Ruyter, a force of sixty or seventy ships-of-the-line, which on the 14th of June, 1667, went up as high as Gravesend, destroying ships at Chatham and in the Medway, and taking possession of Sheerness. The light of the fires could be seen from London, and the Dutch fleet remained in possession of the mouth of the river until the end of the month. Under this blow, following as it did upon the great plague and the great fire of London, Charles consented to peace, which was signed July 31, 1667, and is known as the Peace of Breda. The most lasting result of the war was the transfer of New York and New Jersey to England, thus joining her northern and southern colonies in North America.
Before going on again with the general course of the history of the times, it will be well to consider for a moment the theory which worked so disastrously for England in 1667; that, namely, of maintaining a sea-war mainly by preying upon the enemy's commerce. This plan, which involves only the maintenance of a few swift cruisers and can be backed by the spirit of