Short as the struggle of Ireland had been it had served Lewis well, for while William was busy at the Boyne a series of brilliant successes was restoring the fortunes of France. In Flanders the Duke of Luxembourg won the victory of Fleurus. In Italy Marshal Catinat defeated the Duke of Savoy. A success of even greater moment, the last victory which France was fated to win at sea, placed for an instant the very throne of William in peril. William never showed a cooler courage than in quitting England to fight James in Ireland at a moment when the Jacobites were only looking for the appearance of a French fleet on the coast to rise in revolt. The French minister in fact hurried the fleet to sea in the hope of detaining William in England by a danger at home; and he had hardly set out for Ireland when Tourville, the French admiral, appeared in the Channel with strict orders to fight. Orders as strict had been sent to the allied fleets to engage even at the risk of defeat; and when Tourville was met on the 30th of June 1690 by the English and Dutch fleet at Beachy Head the Dutch division at once engaged. Though utterly outnumbered it fought stubbornly in hope of Herbert's aid; but Herbert, whether from cowardice or treason, looked idly on while his allies were crushed, and withdrew with the English ships at nightfall to seek shelter in the Thames. The danger was as great as the shame, for Tourville's victory left him master of the Channel and his presence off the coast of Devon invited the Jacobites to revolt. But whatever the discontent of Tories and Nonjurors against William might be all signs of it vanished with the landing of the French. The burning of Teignmouth by Tourville's sailors called the whole coast to arms; and the news of the Boyne put an end to all dreams of a rising in favour of James. [Sidenote: Intrigues in England.]