by Tlascaltecs, and protected by bodies of infantry. A corps of pioneers accompanied them with pickaxes, mattocks, crow-bars, and ladders, to destroy barricades and walls, and to scale buildings. Four cannon were also brought. The rear was protected by a portion of the cavalry. The Aztecs were at first amazed at the curious moving turrets, and feared that they might contain more terrible destroyers even than the grapecharged guns; but finding them less dangerous, they continued their efforts, and fast and thick poured the stones and arrows on the line of advance, particularly on the engines, which were severely damaged. The march proceeded, however, with more or less interruption till a raised bridge was reached on the main road, where the Indians had gathered in vast numbers, with an evident determination to check the expedition. The turrets were brought alongside the houses adjoining the canal in order to clear the crowded roofs, but regardless of the volleys from the firelocks, the natives on the roofs plied their missiles only the faster, letting fly heavy rocks[1] upon the engine coverings, so as to render them untenable and hinder the manœuvring of the cannon. This success enabled the warriors beyond the canal and behind the barricades to maintain their assault with great effect, and to prevent a further advance. They gained a considerable advantage by a change of tactics in directing the missiles to a great extent against the legs of the Spaniards, to their serious discomfiture.[2] After spending the greater part of the forenoon in an unsuccessful attempt to destroy the houses nearest the canal, and to fill a passage across it, the troops retired to the fort greatly disheartened. Even the Tlascaltecs, who were usually so glib of tongue in replying to Aztec taunts, for once held their peace.[3]
Meanwhile the battle raged fiercely round the fort.
