During these scenes, Wadsworth's and Scott's brigades, which were below Douglas on the river lines, saw that their only safety lay, also, in immediate retreat, and falling back, they joined the other brigades above, though not without suffering some loss. The parties now in the greatest danger were Silliman's brigade and Knox with detachments of the artillery, who were still in the city three miles below. When Putnam, to whose division they belonged, found that no stand could be made at Kip's Bay or Murray's Hill, he galloped down through Wadsworth's and Scott's retreating troops, to extricate Silliman and the others.[186] Not a moment's time was to be lost, for should the British stretch out their troops west of the Bloomingdale Road to the North River, escape would be impossible. Silliman, meanwhile, had taken post with Knox in and to the right of Bayard's Hill Fort, from the top of which they could see the enemy occupying the island above them. At this juncture, Major Aaron Burr, Putnam's aid, rode up to the fort with orders to retreat. He was told that retreat was out of the question. Knox said that he should defend the fort to the last. But Burr, who knew the ground thoroughly, declared that he could pilot them safely to the upper end of the island, and Silliman's men set out for the attempt.[187] Putnam also had called in other guards, and the entire force then took to the woods above Greenwich, on the west side, and keeping under cover wherever it was possible, made their way along without opposition. But it proved to be a most trying and hazardous march. The day was "insupportably hot;" more than one soldier died at the spring or brook where he drank; any moment the enemy, who at some points were not half a mile away, might be upon them. Officers rode in advance and to the right to reconnoitre and see that the way was clear. Putnam, Silliman, Burr, and others were conspicuous in their exertions. Silliman was "sometimes in the front, sometimes in the centre, and sometimes in the rear." The men extended along in the woods for two miles, and the greatest precautions were necessary to keep them out of sight of the main road.[188] Putnam encouraged them continually by flying on his horse, covered with foam, wherever his presence was most necessary. "Without his extraordinary exertions," says Colonel Humphreys, who frequently saw Putnam that day, "the guards must have been inevitably lost, and it is probable the entire corps would have been cut in pieces." Much, too, of the success of the march was due to Burr's skill and knowledge. Near Bloomingdale, the command fell in with a party of the British, when Silliman formed three hundred of his men and beat them off. After making a winding march of at least "twelve miles," these greatly distressed troops finally reached Harlem Heights after dark, to the surprise and relief of the other brigades, who had given them up for lost.