By this time Garland, having found by pushing a company forward that San Antonio had been evacuated, hastened on to unite with Clarke. The enemy were quickly driven from fortifications of a minor importance at Sotepingo, and the division then rushed forward after Bravo, while the Mexicans--a mass of cavalry, infantry and artillery, wagons, mules, women, servants, carriages and camp-followers--made all possible speed. Owing to the effects of the rains, two Mexican guns and a number of wagons were mired on the way; and near the Churubusco bridge Pérez's brigade, hard pressed by the Americans from San Angel, crowded in upon the stream of fugitives.[26.15] [Illustration: TÊTE DE PONT. Profile of east curtain.] So it happened that when Engineer Stevens climbed the church tower of Coyoacán at about noon to reconnoitre, he observed a large body of Mexican troops pouring along the highway from San Antonio. Apparently Santa Anna was drawing all his forces to the city. Dense fields of corn six feet high or more almost hid the works at the convent. Perceiving, however, the nose of a bastion, Stevens concluded there might be one gun at that point, which he thought could be rushed; and a prisoner mentioned only two guns. The entire American army, reacting from the gloom of the previous evening, exultant over Smith's victory, and almost intoxicated by the change from storm to splendid sunshine, was now feeling invincible, eager and over-confident. Stevens merely shared the contagion; his report--precipitate and misleading, as he fully admitted later--signified that without loss of a moment the San Antonio garrison ought by all means to be intercepted; and so Scott did what we know it had not been his intention to do: ordered Twiggs immediately to the convent and highway by the direct road. "Make haste, my sons," he called to the troops, "or they will be gone before you reach them!"[26.16] At his instance and by way of precaution, engineers were sent on to make investigations; but, as the case appeared simple and urgent, the investigating and the fighting began hastily together. In a haphazard way the Mounted Rifles, or at least a part of them, became engaged; then the First Artillery advanced; and soon the rest of Smith's brigade--the Third Infantry--besides the engineer company and Taylor's battery were thrown in. Rincón, a gray-haired Spanish veteran, deceived our generals, for he desired to save ammunition, and therefore did not open his artillery fire till the Americans had come within musket range. To pause after the conflict began would have chilled the ardor of the troops and encouraged the enemy. Victory or defeat were the only alternatives, and a defeat could not be thought of.[26.16] [Illustration: The Fortifications of Churubusco Convent]