THREE:On the 10th of September the Prussians began to examine the passes of the forest; and finding them defended, they attacked the French entrenchments but were everywhere repulsed. On the 11th, they concentrated their efforts on the pass of Grand-Pr, defended by Dumouriez himself, and were again repulsed by General Miranda at Mortaume, and by General Stengel at St. Jouvion. The Allies, thus unexpectedly brought to a check, for they had been led by the Emigrants to expect a disorganised or as yet undisciplined army, determined to skirt the forest and endeavour to turn it near Sedan. Whilst engaged in this plan, the Austrians discovered the weakness of the force in the defile of Croix-aux-Bois, where only two battalions and two squadrons of volunteers were posted, for Dumouriez had not examined the pass himself and was assured that this force was amply sufficient. Once aware of this mistake, the Austrians, under the Duke de Ligne, briskly attacked the position and drove the French before them. Dumouriez, informed of this disorder, ordered forward General Chasot with a strong force, who defeated the Austrians, killed De Ligne, and recovered the pass. But the advantage was but momentary; the Austrians returned to the charge with a far superior force, and again cleared the pass and remained in possession of it. Thus Dumouriez saw his grand plan of defence broken up; and finding that Chasot, who had fallen back on Vouziers, was cut off from him on his left along with Dubouquet, he saw the necessity of falling back himself into the rear of Dillon, on his right, who was yet master of the Islettes and the road to St. Menehould. He then sent messages to Chasot, Dubouquet, and to Kellermann, to direct their march so as to meet him at St. Menehould.