Abercromby's force was for the moment paralysed. Half of his army was lost, nor did he know where to find it. So much of it as he could collect he kept under arms all night, and next morning he fell back to his landing-place, where to his great relief he found the rest of his troops awaiting him. Montcalm meanwhile had been devoured by anxiety. The channel between Lake George and Lake Champlain being impassable by boats owing to rapids, the usual route to Ticonderoga lay across it by some saw-mills at the foot of the rapids, where he had already destroyed the bridge. Nevertheless it was not by these saw-mills but on the western bank of the channel that he had determined to make his stand; nor was it until the evening of the 6th that, yielding to the advice of two of his officers, he decided to retire to Ticonderoga. Accordingly, at noon of the 7th, Abercromby sent Rogers forward with a detachment to occupy the saw-mills. The bridge was rebuilt; and the army, crossing the channel late in the afternoon, occupied the camp deserted by the French. Abercromby was now within two miles of Ticonderoga. But meanwhile Montcalm had not been idle. The peninsula of Ticonderoga consists of a rocky plateau with low ground on each side, standing at the junction of Lakes George and Champlain. The fort stood near the end of this peninsula; and half a mile to westward of the spot the ground rises and forms a ridge across the plateau. On this ridge Montcalm decided at the last moment to throw up abatis and accept battle. The outline of the works had already been traced, and at the dawn of the 7th every man of his force was at work, cutting down the trees that covered the ground. The tops were cut off and the logs piled into a massive breast-work nine feet high, which was carefully loop-holed. The forest before the breast-work was also felled and left lying with the tops turned outwards, as though, to use the words of an eye-witness, it had been laid low by a hurricane. Between these felled trees and the breast-work the ground was covered with heavy boughs, their points being sharpened and the branches interlaced, so as to present an almost impenetrable obstacle. The French officers themselves were amazed at the work which had been accomplished in one day. [Sidenote: July 8.]