Frederick Graff, Jr. (1817-1890) and Frederick Graff, Sr. (1775-1847), View of the Chain Bridge and Falls of Schuylkill, Five Miles from Philadelphia
Frederick Graff, Jr. (1817-1890), Engineer of Philadelphia Water Works and Photographer Frederick Graff, Sr. (1775-1847), Engineer of Philadelphia Water Works Photograph of Thomas Birch painting, View of the Chain Bridge...