CHAPTER XVI. 1847.

good generalship. If the capital were taken first, the Mexicans instead of retreating towards Guadalupe and the north, when we attacked and captured from the south, would of course retire to the avoided stronghold of Chapultepec; and, if our slender forces were subsequently obliged to leave the city in order to take the fortress, our sick, wounded and thinned regiments would be left to the mercy of the mob and the leperos. Chapultepec would thus become the nucleus and garrison of the whole Mexican army, and we might be compelled to fight two battles at the same time,—one in the city, and the other at the castle. But, by capturing the castle first, and seizing the road northward beyond it, we possessed all the most important outworks in the lap of the valley, and cut off the retreat of the Mexicans from the city either to the west, to the castle, or towards our rear in the valley. We obtained, moreover, absolute command of two of the most important entrances to the capital, inasmuch as from the eastern foot of the hill of Chapultepec two causeways, and aqueducts raised on lofty arches, diverged northeastwardly and eastwardly towards the city. The northernmost