Workshop of the World

stories of industry in & around Philadelphia


John J. Macfarlane, Early History of Chestnut Hill, 1927.

Douglas Macfarlan, The Wissahickon Mills, 3 vols., 1949, typescript (Free Library of Philadelphia Map Room).

James F. Magee, Jr., Wissahickon Valley Industrial Mills, Colonial and Revolutionary, 1934, typescript (Free Library of Philadelphia Map Room).

(No author), The Royal Road to Wealth, An Illustrated History of the Successful Business Houses of Philadelphia, (1869).

"Abstracts of News and Advertisements in the Germantown Telegraph 1830-1868 and Germantown Chronicle 1869-1872, with Index," Compiled 1946 by Edward W. Hocker (Germantown Historical Society).

Naaman H. Keyser, "Early Transportation to Germantown," in Germantown History, (1915).

Nicholas Wainwright, History of the Philadelphia Electric Company, (1961).

Jefferson M. Moak (compiler), "Inventory of Buildings Within the Chestnut Hill District: An Appendix to the Chestnut Hill Historic District Nomination for the National Register of Historic Places," March 14, 1985.

Willard S. Detweiler, Jr., Inc., Chestnut Hill: An Architectural History, 1969.

Campbell Collection, Germantown Historical Society.

Firth Collection, Germantown Historical Society.


J. C. Sidney, Map of the Township of Germantown, 1848 (Germantown Historical Society).

John C. Cresson, Wissahickon Creek from its Mouth to Paul's Mill Road, Defining boundaries of land appropriated by the Commissioners of Fairmount Park, For the protection of the purity of the water of said creek and the preservation of the beauty of its scenery, Declared to be a part of Fairmount Park, By act of the General Assembly of the Commonwealth of Pennsylvania approved the 14th day of April A.D. 1868, 1869 (Fairmount Park Historical Files).

Douglas Macfarlan, Early Mills Along the Wissahickon, (1935, revised 1949), in D. Macfarlan, The Wissahickon Mills, Vol. 1, typescript, 1949 (Free Library of Philadelphia Map Department).

Wissahickon Creek, c.1870 (Library Company of Philadelphia).

Hexamer General Surveys, c.1866-95.


Frank Casper, PECO Engineer, Interview and Tour, September 1, 1989
Robert Yarnall, (interview with Harold E. Spaulding) August 23, 1988
Albert Pio, Bartolomeo Pio, Inc., Telephone interview, October 17, 1989
John Tucker, SEPTA Director of Strategic Planning, Telephone interviews, September 1, 1989, and November 9, 1989
John Romano, Chestnut Hill Resident, Interview, September 7, 1989