Our detachment on the causeway of Tacuba continued our approach towards Mexico, filling up every ditch and canal as we advanced by means of the materials of the houses which we destroyed; and we every day gained possession of temples or houses, which stood apart from each other, and of the bridges by which they communicated. To avoid jealousy, our three companies took the duties of working and fighting alternately, our allies giving most important assistance in pulling down the houses and filling up the ditches and cross-cuts of the causeway. Every evening the whole of our men stood to their arms, and we sent off our allies before us, before retreating to our post for the night. During all this time, Sandoval, who carried on his approach from Tepejacac, was obliged to sustain continual attacks from the enemy; as likewise was Cortes, who now commanded at the third attack.

On his side there was an out-post of the Mexicans, at a place where one of the apertures in the causeway was too deep to be forded, and which had been strongly fortified by the enemy. He made a successful attack on this place, where he commanded in person, although the enemy made a brave resistance both by land and water; but he was obliged to retire at night without filling up the ditch, and he lost four Spaniards killed, and had above thirty wounded, the pass being commanded from the terraces of several houses in the water, and his brigantines were unable to get forward to protect his flanks, owing to the piles which the enemy had fixed under water. Guatimotzin and his Mexicans defended themselves with amazing bravery and resolution, trusting to wear us out and destroy us by continual assaults. On the 21st of June, the anniversary of the day of our first entry into Mexico, the enemy assailed us at every point of all our three attacks, both by land and water, in front, flanks, and rear, about two hours before day. The number fit for duty at our post on the causeway of Tacuba was 120 men, and all the allies attached to our detachment, were as usual off the causeway during the night. It was with the utmost difficulty that we were able to resist and repulse the enemy, of whom a great number were killed and wounded, losing two of our own soldiers. The enemy repeated their assaults on all the posts for two other nights successively; and on the third morning, just at day-break, they concentrated their whole force and made a desperate attack on our post. If our allies had been with us we should have been all lost. On this occasion our cavalry saved our rear, and our brigantines did signal service by clearing our flanks. After a most severe and long doubtful contest, we beat off the enemy and made four of their chiefs prisoners, eight of our soldiers being slain in this tough affair. I fear my readers may be tired of this constant repetition of battles, which my duty of historian compels me to relate: But if I were to give an account of every action which took place during the ninety-three days in which we were engaged in the siege of this great, strong, and populous city, every day and night of which time brought a perpetual succession of battles and assaults, my work would be without end, and would more resemble Amadis de Gaul and other romances of chivalry than a true history, which it really is.

Cortes became impatient of delay, and proposed in a council of war to make a general assault on the city, marching at once by all the three causeways, and uniting our whole force in the great square, whence we could command all the streets leading to that centre of Mexico. Some of the members of the council objected greatly to this plan, giving the preference to our present system of advancing gradually, filling up the ditches as we proceeded, and destroying the houses to make roads and defences of their materials. They alleged that if we were to succeed in forcing our way into the great square, we should in our turn be besieged in the heart of the city, exactly as we had been before our flight from Mexico, and be involved in much greater difficulties than now; as the enemy would be enabled to environ us with their whole force by land and water, and would cut off all possibility of our retreat, by cutting through the causeways. But Cortes, after hearing all these well founded reasons, still adhered to his own plan, and issued orders for the whole army, including the allies, to attack the city next day, and to use our utmost efforts to get possession of the great square. On the next morning therefore, having recommended ourselves to God in the solemn service of the mass, all our three detachments marched to attack the posts of the enemy on their several fronts. In our attack commanded by Alvarado, most of the Spaniards were wounded at the first ditch and parapet of the enemy; one Spaniard was slain, and above a thousand of our allies were killed or wounded. In the attack commanded by Cortes in person, he carried every thing before him at first, and having driven the enemy from a post where the water was very deep and the causeway very narrow, he imprudently pushed on after the enemy followed by the Indian allies. The enemy induced him by frequent halts and feigned resistance to continue the pursuit, having even narrowed the causeway on purpose, and Cortes negligently omitted to fill up the deep ditch which he had passed. When the enemy perceived that our general had fallen into the snare which they had laid for him, they attacked him with fresh troops in front, while numerous canoes filled with warriors issued out at an appointed signal and assailed him both on the flanks and rear, his brigantines being unable to approach for his defence by the pallisades under water. Retreat became now indispensably necessary, which was at first conducted with perfect regularity; but when they came to the narrow part of the causeway, which was all covered with mud and water, the retreat changed to an absolute flight, our people flying from the enemy with their utmost speed, without even attempting to defend themselves. Cortes used every effort to rally his men, but all in vain, and was wounded in the leg at the narrow pass by some of the enemy from the canoes. At this pass, six of our horses were killed, and seventy-two Spaniards were carried off alive. At this moment six Mexican chiefs seized Cortes, but by the will of God, Christoval de Olea, that valiant soldier, and another brave man named Lerma flew to the rescue of our general. De Olea killed four of the chiefs with his own hand, and gallantly lost his life in defence of Cortes, while Lerma narrowly escaped. Other brave soldiers arrived at this moment to his aid, among whom was Quinones the captain of his guards. By these men he was lifted out of the water and hurried off from among a crowd of the enemy. At this critical moment, Guzman his majordomo, brought up a horse on which our wounded general was mounted. The enemy followed up their success with increasing ardour, Cortes and the shattered remains of his troops, retreating to their quarters with the utmost difficulty, pursued to the last by the Mexicans.

After our first attack, in which we defeated the enemy and drove them from their post, we were met by fresh bodies of the enemy, marching in great parade, bearing rich plumes of feathers and ornamented standards. On coming near, they threw down before us five bleeding heads, saying these were the heads of Cortes and his officers, and that we should soon meet the same fate. They then marched up, and fought us hand to hand with the utmost valour, insomuch that we were at length compelled to retreat. As usual, we gave orders to our allies to clear the way, by retreating before us; but the sight of the bloody heads had done this effectually, and not a man of them remained on the causeway to impede our flight. Our cavalry made several charges this day, but our great safety depended upon two guns which raked the whole causeway, and were admirably managed by Pedro Morena, an excellent officer, whose services this day were singularly useful, as the whole causeway was crowded by the enemy. Before we arrived at our quarters, and while pursued by the enemy, we heard the shrill timbals and mournful sound of the great drum from the summit of the temple of the god of war. The priests were then sacrificing the hearts of ten of our companions to their accursed idols, and the sound of their dismal drum, which might be heard at almost three leagues off, might be imagined to be the music of the infernal deities. Soon after this, the horn of Guatimotzin was heard, giving notice to the Mexican officers either to make prisoners of their enemies, or to die in the attempt. It is utterly impossible to describe the fury with which they assailed us on hearing this dreadful signal, though the remembrance is still as lively as if now passing before me: I can only say, that it was the good pleasure of God that we got back in safety to our post; praised be his mercy now and for ever. Amen! We were ignorant of the fate of our other detachments. Sandoval was more than half a league from us, and Cortes still farther. The melancholy sight of the heads of our countrymen, and the loss of one of our brigantines in which three of our soldiers were slain, filled us with melancholy, and we almost thought that we had reached the last hour of our lives. Our captured vessel was afterwards recovered by Captain Xaramillo. In the action of this day, Captain Caravajal, a most gallant officer, had the honour of being the first who broke through the enemies pallisades with his vessel: He now lives in La Puebla, and has been ever since entirely deaf, having lost his hearing this day by excessive exertion.