The date taken, 1660, followed closely another which marked a great settlement of European affairs, setting the seal of treaty upon the results of a general war, known to history as the Thirty Years' War. This other date was that of the Treaty of Westphalia, or Munster, in 1648. In this the independence of the Dutch United Provinces, long before practically assured, was formally acknowledged by Spain; and it being followed in 1659 by the Treaty of the Pyrenees between France and Spain, the two gave to Europe a state of general external peace, destined soon to be followed by a series of almost universal wars, which lasted as long as Louis XIV. lived,--wars which were to induce profound changes in the map of Europe; during which new States were to arise, others to decay, and all to undergo large modifications, either in extent of dominion or in political power. In these results maritime power, directly or indirectly, had a great share. We must first look at the general condition of European States at the time from which the narrative starts. In the struggles, extending over nearly a century, whose end is marked by the Peace of Westphalia, the royal family known as the House of Austria had been the great overwhelming power which all others feared. During the long reign of the Emperor Charles V., who abdicated a century before, the head of that house had united in his own person the two crowns of Austria and Spain, which carried with them, among other possessions, the countries we now know as Holland and Belgium, together with a preponderating influence in Italy. After his abdication the two great monarchies of Austria and Spain were separated; but though ruled by different persons, they were still in the same family, and tended toward that unity of aim and sympathy which marked dynastic connections in that and the following century. To this bond of union was added that of a common religion. During the century before the Peace of Westphalia, the extension of family power, and the extension of the religion professed, were the two strongest motives of political action. This was the period of the great religious wars which arrayed nation against nation, principality against principality, and often, in the same nation, faction against faction. Religious persecution caused the revolt of the Protestant Dutch Provinces against Spain, which issued, after eighty years of more or less constant war, in the recognition of their independence. Religious discord, amounting to civil war at times, distracted France during the greater part of the same period, profoundly affecting not only her internal but her external policy. These were the days of St. Bartholomew, of the religious murder of Henry IV., of the siege of La Rochelle, of constant intriguing between Roman Catholic Spain and Roman Catholic Frenchmen. As the religious motive, acting in a sphere to which it did not naturally belong, and in which it had no rightful place, died away, the political