Woolworth Building, boiler room from N.W. corner.

Woolworth Building, boiler room looking N.W.

Woolworth Building, exterior from N.W. corner.

Woolworth Building, engine room from N.W. corner.

Woolworth Building, engine room looking N.W.

Woolworth Building, boiler room from N.E. corner.

Woolworth Building, boiler room from S.W. corner.

Woolworth Building, rear from N.W. corner.

Woolworth Building, shoring N.W. corner.

Woolworth Building. Boiler room.

Woolworth Building, boiler room.

Woolworth Building, sub-cellar N.W. corner.

Woolworth Building, from S.E. corner looking N.W.

Woolworth Building, sub-basement engine room from S.E. looking N.W.

Woolworth Building, engine room from S.W. corner.

Woolworth Building, exterior from N.W.

Woolworth Building, sub-cellar, pit in N.W. corner.

Woolworth Building, [from] Barclay looking N.W.

Woolworth Building, sub-basement from N.E. corner room from S.W. corner.

Woolworth Building, boiler room.