Tyrconnell, during the eventful summer months when the revolution was ripening both in Holland and England, had taken, unknown even to James, a step of the gravest importance. To him the first intelligence of the preparations of William were carried by a ship from Amsterdam, and by him they were communicated to the infatuated King, who had laughed at them as too absurd for serious consideration. But the Irish ruler, fully believing his informants, and never deficient in audacity, had at once entered into a secret treaty with Louis XIV. to put Ireland under the protection of France, in the event of the Prince of Orange succeeding to the British throne. No proposition could more entirely suit the exigencies of Louis, of whom William was by far the ablest and most relentless enemy. The correspondence which has come to light in recent times, shows the importance which he attached to Tyrconnell's proposition—an importance still further enhanced by the direct but unsuccessful overture made to the earl by William himself, on landing in England, and before embarking in the actual invasion of Ireland.
William Henry, Prince of Orange, now about to enter on the scene, was in 1688 in the thirty-seventh year of his age. Fearless of danger, patient, silent, impervious to his enemies, rather a soldier than a statesman, indifferent in religion, and personally adverse to persecution for conscience' sake, his great and almost his only public passion was the humiliation of France through the instrumentality of a European coalition. As an anti-Gallican, as the representative of the most illustrious Protestant family in Europe, as allied by blood and marriage to their kings, he was a very fit and proper chief for the English revolutionists; but for the two former of these reasons he was just as naturally antipathetic to the Catholic and Celtic majority of the Irish. His designs had been long gradually maturing, when James's incredible imprudence hastened his movements. Twenty-four ships of war were assembled at Helvoetsluys; 7,000 sailors were put on board; all the veterans of the Netherlands were encamped at Nimeguen, where 6,000 recruits were added to their numbers. On the 5th of November, the anniversary of the gunpowder plot, "the Deliverer," as he was fondly called in England, landed at Torbay; on the 25th of December, James, deserted by his nobles, his army, and even his own unnatural children, arrived, a fugitive and a suppliant, at the court of France.