As at the other garitas, no gates existed here, but a ditch and a parapet blocked one half of the causeway and a zigzag redoubt the other. Just at the north was the stone house intended for guards and customs officials, beyond which lay the wide _Paseo_ (Promenade). South, on the Piedad road, were artillery and infantry that could fire through the arches. Inside the garita, buildings extending toward the east offered shelter, and in open ground a little more toward the north and about 300 yards distant, the extensive edifice called the citadel, protected with a wall and a wet ditch, constituted a serious obstacle.[28.19] Santa Anna, after acting like a madman when Chapultepec fell, came to this garita. General Terrés, a brave old Spaniard, commanded here with about 180 infantry and some artillerymen. Santa Anna gave him three guns of medium power, and stationed General Ramírez in the Paseo, Brevet General Argüelles on the opposite side, and General Perdigón Garay and Colonel Barrios in the rear with substantial reserves.[28.19] On approaching this formidable position, Quitman encountered a withering storm of bullets, grape and solid shot from both sides and the front, and suffered rather severely. But Drum and Benjamin, iron men, bringing up as soon as possible a long 18-pounder and a 24-pound howitzer on the opposite sides of the aqueduct, dampened the ardor of the Mexicans not a little, and splinters from the masonry did havoc among the sheltered artillerymen at the garita. Some troops already beaten at Chapultepec and at the intermediate battery soon became demoralized. At about one o'clock rumors crept in that Americans from the southern front were turning the position. Ramírez, Garay, Argüelles and Barrios retired without the formality of saying good-by; and Terrés, whose cannon ammunition had failed, withdrew prudently to the citadel with two of the guns and about seventy panicky men, the remnant of his garrison. The Rifles now dashed over the parapet; and at exactly twenty minutes past one a tall, slender man with short, bristling, grayish hair stood on it, smoking a cigar and waving a red handkerchief tied to a rifle. It was Quitman, self-possessed but exultant; and in a few moments the Palmetto colors and the green banner of the Rifles, with its blazing gold eagle, were flying at the portal of the city.[28.19]