But Protestantism, the stern Protestantism of the Calvinist, rallied on its own ground, and behind the mouldering walls of Derry made against a Catholic host one of the heroic defences of history, a worthy theme in an after time for the most brilliant of historians. In the battle of Newtown Butler, Protestantism again triumphed over odds. Succour at length came from England. It came first in the person of the renowned Schomberg, whose army, however, made up of raw recruits, ill supplied by fraudulent contractors, and filled with disease by the moisture of the climate, miserably rotted. At last the bonfires of jubilant Protestantism announced that William of Orange had landed. On the Boyne he gained a small battle but a great victory, which decided that the Protestant Saxon, not the Catholic Celt, should be master of Ireland. James fled to the luxurious asylum of his French master, and with him fled the last hope of the Catholic cause. Once more, however, at Aghrim, the Catholic, under the command of the French General St. Ruth, accepted the wager of battle in open field. He fought well, and the fortune of the day wavered, when a cannon shot took off St. Ruth's head. Protestantism owed its victory largely to a regiment of French Huguenots exiled by the bigoted tyranny of their own king. All was over in the field. The irresistible Marlborough reduced Cork and Kinsale. But in Limerick, by soldiers pronounced untenable, Catholicism had its Derry. Its hero Sarsfield, by a daring march, cut off William's siege artillery, and, after a fierce assault, gallantly repulsed, William was fain to raise the siege. After his departure Ginkell again invested the place, and Sarsfield, finding that the last hour of the last Catholic stronghold had come, capitulated on terms. The military terms of the surrender were strictly observed. The political terms, securing a measure of religious liberty to Catholics, though endorsed by William in his wise Dutch love of toleration, were repudiated by Parliament. The "violated treaty of Limerick" was an ugly business, though there seems to have been no protest at the time. But James had fled. The garrison of Limerick had no status but a military one, to which surrender put an end. Politically they were merely insurgents. Could any political terms made with them have bound the sovereign authority of the Irish and British Parliaments in dealing with their own citizens forever? Can Sarsfield have thought that they did?