were continually relieved by fresh troops, marching out in succession. Finding that we gained nothing by these daily attacks, we changed our plan of operations. On our causeway there was a small open space, on which stood some buildings for religious worship, where we formed a lodgment, and established a post, leaving our cavalry and allies to secure our rear in Tacuba, whence we were supplied with provisions. Though very badly lodged in this place, as every shower of rain came in upon us, we maintained this post and advanced a little towards the city every day, filling up the trenches which intersected the causeway, and pulling down the houses on each side, and using their materials to strengthen our defences. We found it extremely difficult to set the houses on fire, nor could the flames communicate from house to house, as all the houses were separated by canals and ditches. During this operation we were subjected to great danger, as the enemy destroyed us from their terraces when we endeavoured to swim over from the causeway to these detached houses. In this manner we gained some ground every day, which we secured by parapets and other defences, and preserved during the night. Every evening at sunset, the company which was first for duty, was entrusted with the advanced post, to which they sent forty men; the second company sent an equal number at midnight, and the relieved guard did not quit their post, but had to remain sleeping on the ground; the third company did the same the same two hours before day-break, and the second now lay down to sleep, so that we now had 120 men on guard. Sometimes our whole detachment had to remain under arms the whole night, especially on the following occasion: We learnt from some of our prisoners, that the Mexicans intended to force our post by a great effort, which would have frustrated the other two attacks. For this purpose, all the warriors of nine towns around the lake, including those of Tacuba, Izcapuzalco, and Tenajocan, were by a joint attack upon our rear to carry off our baggage and destroy our bakery in Tacuba, while the Mexicans were to assail us in front on the causeway. We immediately communicated this intelligence to our cavalry and allies at headquarters, warning them to keep on the alert. In pursuance of this plan, we were attacked both in front and rear for several successive nights, from midnight to day-break. Sometimes the enemy came on with a prodigious noise of shouting and military instruments, and at other times stole upon us in profound silence; but their night attacks were never made with so much resolution as those during the day. Yet we were harassed to death with continual watching, fatigue, and wounds, and constantly exposed to cold winds and almost incessant rain. Our post was reduced to a mere splash of mud and water, and our only food was maize and miserable herbs. When we complained, the only comfort given us by our officers, was that such is the fortune of war.