so, kenyan cox, for instance, is artist translating riis' photographs here. you see chinese opium den on the bottom and the five cent spot photo we started with enlarged on the front wall is on the left-hand page. >> you know, one of the things that he was very concerned about were the very huge infant mortality rates that the guilder committee i had mentioned, they referred to the rear tenements as slaughter houses for infants. one out of five baseballs born in the tenements, especially in the rear tenements, died in early childhood. and when we talk about rear tenements, and it's not only that the tenement buildings themselves were overcrowded, that many people couldn't even afford to live in the buildings so where else did they live? they lived in dumps. they lived on the street. and they lived in these rear tenements and basically wood shack structures that were built on to the -- in to the back alleyways of often wood or brick tenement buildings. so, high mortality rate's also -- and also the issues of public health, of cholera, diphtheria, titus. contag