I look upon those pitiful concretions of lime and clay which spring up, in mildewed forwardness, out of the kneaded fields about our capital… not merely with the careless disgust of an offended eye, not merely with sorrow for a desecrated landscape, but with a painful foreboding that the roots of our national greatness must be deeply cankered when they are thus loosely struck in their native ground. The crowded tenements of a struggling and restless population differ only from the tents of the Arab or the Gipsy by their less healthy openness to the air of heaven, and less happy choice of their spot of earth; by their sacrifice of liberty without the gain of rest, and of stability without the luxury of change.