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.

In a Ludlow Street tenement lodging cellar.

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

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

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

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

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

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.

In a Ludlow Street tenement lodging cellar.

Mullen's Alley, Cherry Hill.

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

Third Prize Plan Charity Oraganization Society Competition, 1900, lot 100 x 100, Cowell & Smith.