On the evening of July 8th the ground had been carefully reconnoitred and the proper place for the action selected. The intention was to dispute as long as possible the passage of the second ford, and then to fall back upon the ravines. But long ere they reached the scene the swell of the military music, the crash of falling trees apprised them that the foe had already crossed the river, and that his pioneers were advanced into the woodlands. Quickening their pace into a run, they managed to reach the broken ground just as the van of the English came in sight. Braddock had turned from the first bottom to the second, and mounting to its brow was about to pass around the head of the ravines to avoid the little morass caused by the water-course before described. His route did not lie parallel with the most dangerous defile, where the banks are so steep and the cover so perfect, but passed its head at an angle of about forty-five degrees; thus completely exposing his face and flanks from a point on the second bottom, at a hundred yards distance, to another within thirty, where he would turn the ravine. Of course the farther he advanced the nearer he would approach to its brink, till the whole should finally be left behind; thus opening a line of two hundred yards long, at an average distance of sixty, to the enemy's fire. Had he possessed the least knowledge of these defiles, he would undoubtedly have secured them in season, since nothing would have been easier than their occupation by Gage's advanced party. But not a man in his army had ever dreamed of their existence.
The arrangement of the march from the river's bank had been made as follows: The engineers and guides and six light-horsemen proceeded immediately before the advanced detachment under Gage, and the working-party under St. Clair, who had with them two brass six-pounders and as many tumbrils or tool-carts. On either flank, parties to the number of eight were thrown out to guard against surprises. At some distance behind Gage followed the line, preceded by the light horse, four squads of whom also acted as extreme flankers at either end of the column. Next came the seamen, followed by a subaltern with twenty grenadiers, a twelve-pounder and a company of grenadiers. Then the vanguard succeeded, and the wagon and artillery train, which began and ended with a twelve-pounder: and the rear-guard closed the whole. Numerous flanking-parties, however, protected each other; and six subalterns, each with twenty grenadiers, and ten sergeants, with ten men each, were detached for this purpose.