But, by so much intercourse with the Asiatics, especially with the countries particularly subject to the plague, all Europe had been so deeply infected, that the distemper could not but prevail for a long time, even though it had not been kept up by the almost continual wars of the Europeans with one another, which was too much the case. Dr. Sydenham informs us that before his time the plague commonly visited England once in forty years; but by this we must understand a very violent infection; for Dr. Rush tells us that plagues prevailed in London _every year_ from 1593 to 1611, and from 1636 to 1649. The author of the Journal of the Plague Year (1665) mentions a visitation in 1656; and Mr. Carey, in the beginning of his account of the plague of London in 1665, says, that the plague was _almost continually_ among the diseases enumerated in their bills of mortality; so that we may fairly conclude it to have been _endemic_ in that city. Now let us see how England had employed itself. Its kings, as well as many of their subjects, had gone to the holy wars, as they called them, and, by continuing in that devoted country where most probably the pestilence first originated, it is impossible to suppose that some of them did not receive the contagion. Having caught the pestilence in the _holy war_, they came home to diffuse it among their countrymen, and to keep it up by _profane wars_, I suppose, both foreign and domestic. Henry VII put an end to a very long and bloody contest between the houses of York and Lancaster; but he brought the pestilence along with him, which raged violently during the fifteenth and sixteenth centuries. A most violent war, for half a century, on the continent of Europe, and civil wars in England, would still continue to keep the infection alive from 1600 to 1648, when a general peace was concluded; and from the subsequent state of tranquillity, probably, after the violent attack in 1665, it seems to have languished and died in England, as a plant in a soil not natural to it. But, though England has since remained in peace, on the continent it has been otherwise. In the beginning of the eighteenth century, the heroic madness of Charles XII seemed ready to confound the north, while the glorious exploits of prince Eugene and the duke of Marlborough appeared equally confounding to France. In the midst of these grand atchievments, the pestilence silently claimed its share in the common work of destruction; carrying off upwards of two thousand in a week for some time, in 1709, in the city of Dantzick, and, in 1711, twenty-five out of sixty thousand inhabitants in Copenhagen.