panorama. Immense mirrors of every conceivable shape and form were reflecting back the rays of the sun, while the green shores in which they were set enhanced the effect. The white walls, and domes, and spires of the distant city heightened the effect of a picture that can only be fully appreciated by those who have looked downward through the pure atmosphere of such a lofty position; but when I came down to the common level, the charm was broken. Instead of lakelets and crystal springs, I found only pools of surface-water which the rains had left; and the canals were but the ditches from which, on either side, the dirt had been taken to build the causeway through the marsh, and were now covered with a coat of green. These lakes have no outlet, and as evaporation only takes up pure water, all the animal, vegetable, and mineral matter that is carried in is left to stagnate and putrefy in the ponds and ditches.
A practical "man of the times," with more common sense than poetry in his composition, must grieve as he looks at the great advantages here possessed for drainage and irrigation which are unimproved. There is not a spot in the whole valley that is not capable of the most perfect drainage, while basins have been formed by nature in the highest points, from which irrigation could be supplied to the whole valley; but decay and neglect—fitting types of the social condition of the people—every where exhibit themselves. Water stands in all the narrow canals or ditches that occupy the middle of the streets, for the want simply of a sewer to draw it down to the level of the Tezcuco. Once a year the flags are taken off from the covered ditches, and the mud is dipped out, while a bundle of hay, tied to the tail of a dirt-cart, is daily dragged through the open ones.
I have spoken only of the lower division of this valley—the valley in which the city stands. If we consider the two partly separated valleys as one, the whole will constitute an oval basin 75 miles long from north to south, with an average width from east to west of 20 miles.