Florence Nightingale,
Sanitary Statistics of Native Colonial Schools and Hospitals
“ We all know how difficult it is to preserve health among dense populations in our houses at home. We may hence infer how much more difficult it is to draw together numbers of uncivilized or partially civilized people, within the same boundary, or under the same roof, without great risk to health and life. Bring a healthy family from the open country into a narrow crowded London alley, and the little ones will die, the elder ones will be sick for, perhaps, the first time of their lives, and the parents will fall into confirmed ill health, to say the least of it. ”
