Such was the chagrin experienced by Marlborough at these untoward events, that he was thrown into a fever, the result of fatigue, watching, and anxiety. His physician earnestly counselled him to leave the camp, and retire to Brussels, as the only means of arresting his distemper; but nothing could induce him to leave his post at such a crisis. He continued in his tent accordingly, and the orders were issued by Marshal Overkirk. He was greatly relieved on the 7th, by the arrival of Prince Eugene, who, finding his troops could not come up in time, had left his cavalry at Maestricht, and hastened in person, though without any followers but his personal suite, to take part in the approaching conflict. Great was the joy of Marlborough on learning the arrival of so illustrious a general; not a feeling of jealousy crossed the breast of either of these great men. His first words to Eugene were--"I am not without hopes of congratulating your Highness on a great victory; for my troops will be animated by the presence of so distinguished a commander." Eugene warmly approved the resolution he had taken of instantly attacking the enemy: and a council of war having been summoned, their united opinion prevailed over the objections of the Dutch deputies, who were now seriously alarmed for their barrier, and it was resolved to give battle to the enemy in his position in front of OUDENARDE.[19] The Allies broke up at two in the morning of the 9th July, and advanced towards the French frontiers at Lessines in four great columns. So rapid and well ordered was the march, that before noon the heads of the columns reached Herfilingen, fourteen miles fron Asche, whence they had started. Bridges were rapidly thrown over the Dender, and it was crossed early on the following morning in presence of Eugene and Marlborough, whom the animation of the great events in progress, had, in a manner, raised from the bed of sickness.[20] Here the duke halted, and the troops encamped in their order of march with their right on the Dender and their front covered by a small stream which falls into that river. By this bold and rapid movement, Vendome's well-concerted plan was entirely disconcerted; Marlborough had thrown himself between the French and their own frontier; he had rendered himself master of their communications; and instead of seeking merely to cover his own fortresses, threatened to compel them to fall back, in order to regain their communications, and abandon the whole enterprise which had commenced with such prospects of success. Vendome was extremely disconcerted at this able movement, and he gave immediate orders to fall back upon Gavre, situated on the Scheldt below Oudenarde, where it was intended to cross that river.