Down the highway, at a slow pace, rode a cavalryman wearing a gray uniform, with a sergeant's chevrons, and mounted on a steed good in his day, but whose day was gone. A great clot of blood had gathered on his broad white chest, where a bayonet had thrust him deep. Despite his exhaustion, he moved forward at the urgency of his rider's heel and hand. The soldier held a long, heavy staff planted on one stirrup, from the top of which drooped in the dull air the once gay guidon, battle-rent and sodden with rain, and as he went he shouted at intervals, "Dovinger's Rangers! Rally on the guidon!" Now and again his strident boyish voice varied the appeal, "Hyar's yer Dovinger's Rangers! Rally, boys! Rally on the reserve!" Indeed, despite his stalwart, tall, broad-shouldered frame, he was scarcely more than a boy. His bare head had flaxen curls like a child's; his pallid, though sunburned face was broad and soft and beardless; his large blue eyes were languid and spiritless, though now and then as he turned an intent gaze over the field they flared anew with hope, as if he expected to see rise up from that desolate expanse, from among the stiffening carcasses of horses and the stark corpses of the troopers, that gallant squadron wont to follow, so dashing and debonair, wherever the guidons might mark the way. But there was naught astir save the darkness slipping down by slow degrees--and perchance under its cloak, already stealthily afoot, the ghoulish robbers of the dead that haunt the track of battle. They were the human forerunners of the vulture breed, with even a keener scent for prey, for as yet the feathered carrion-seekers held aloof; two or three only were descried from the field hospital, perched on the boughs of a dead tree near the river, presently joined by another, its splendid sustained flight impeded somewhat by the rain, battling with its big, strong wings against the downpour of the torrents and the heavy air. And still through all echoed the cry, "Rally on the guidon! Dovinger's Rangers! Rally on the reserve!"