Branch of the Chickamauga when the enemy appeared in heavy force on the opposite bank. Negley tried to check him from the north bank with ten guns, to which he replied with two batteries. The rebel infantry deployed and advanced against Negley's left, and was soon heavily engaged. By skilful manœuvring, the incipient attack was, however, foiled, and the retreat continued in good order, though at first it had to be made step by step and in constant conflict with the enemy; and the base of Lookout Mountain was reached in safety by the two divisions. It was altogether a lucky escape, for our strength did not exceed 9000, while the pursuing enemy numbered, according to the rebel records, over 15,000.
General McCook had made discoveries by his reconnoissances that left him no choice but to take the responsibility of not obeying his orders to advance rapidly to Summerville. The information brought in by his cavalry was so positive as to leave no doubt in his mind that the bulk of the rebel army was not retreating, but concentrating between him and the other corps. He wisely stopped his command for this and the additional reason that he failed to discover any signs of the approach of General Thomas's corps, which, as already stated, was to be at Lafayette and connect with his left on the 10th. McCook unquestionably did right in not running the risk of getting involved in an unequal contest with the enemy without being assured of support. He accordingly remained stationary, except that he cautiously moved his trains back to a safer position. He received an explanation of the delay of the Fourteenth Corps en route late in the evening of the 11th from General Thomas, indicating his purpose to continue his march to Lafayette, which he expected to reach on the 12th.
General Rosecrans clung to the illusion that Bragg was in full retreat and bent upon flight and not upon fight, until the reports of McCook's discoveries and Negley's experiences opened his eyes as to the real situation on the
