Sordid surroundings, ignorance, and overcrowding did the rest.
The overcrowding in cottages leads to what may be called an indifference to decency.
Surely this must indicate that the cause of decay is not overcrowding.
Diseases are due to dirt, to vice, to overcrowding, to want of common-sense.
"There will be no overcrowding to night," said Mrs. Blake bitterly.