New York, 1920. Exchange Court Building at 52 Broadway and Exchange Place. View full size. Photograph by Irving Underhill. Completed in 1898, the structure was rebuilt with additional floors and a modern facade in 1980-82.

New York, 1908. Hudson Terminal Buildings at 30-50 Church Street showing cemetery and construction of elevated railway. View full size. Irving Underhill photo. The complex was razed in 1971 to make way for 5 World Trade Center.

New York, 1916. Heckscher Building at 50 East 42nd Street and Madison Avenue. View full size. Irving Underhill photo. The building, which still stands, used to have a squash court on the 23rd floor. Nowadays it's dwarfed by its neighbors.

New York, 1921. Equitable Trust Building and Hotel Biltmore. View full size. Photograph by Irving Underhill.

Broad Street south from Wall Street, 1911. View full size. Irving Underhill.

New York Stock Exchange and Wilks Building at Wall and Broad streets, 1921. View larger. Irving Underhill photo. Note the size of the camera.

1910 Irving Underhill photo of the 22-story Flatiron (Fuller) Building at 175 Fifth Avenue, one of the earliest (1902) buildings in New York to attain such heights. View full size. More here.

Wall Street east from Nassau Street, 1911. View full size. Irving Underhill.