Ground plan of a Cherry Street block showing crowding on lot.

Blindman's Alley, 22 Cherry Street.

Blindman's Alley, 22 Cherry Street.

Blindman's Alley, 22 Cherry Street.

Blindman's Alley, 22 Cherry Street

Blindman's Alley, 22 Cherry Street.

Mullen's Alley, Cherry Hill.

Mullen's Alley, Cherry Hill.

In a Ludlow Street tenement lodging cellar.

Bird's-Eye View of an East Side Tenement Block.

Bird's-Eye View of an East Side Tenement Block.

General plan of the RIverside Buildings (A. T. White's) in Brooklyn.

Floor plan of one division in the Riverside Buildings, showing six "apartments."

First Prize Plan Charity Organization Society Competition, 1900, 100 x 100 feet lot.

In a Ludlow Street tenement lodging cellar.

In a Ludlow Street tenement lodging cellar.

First Prize Plan Charity Organization Society Competition, 1900, 100 x 100 feet lot.

Shoemaker working in a house in the yard of 219 Broome Street, which the landlord built when the sanitary police put him out of the basement. Clatterpole sticks up through his house. Rent $12 a month.

Mullen's Alley, Cherry Hill.

Mullen's Alley, Cherry Hill.