463696 Keystone Marble Works, printed by Herline & Co., 1856 (litho tinted with two stones) by American School, (19th century) (after); 47 x 40 cm; Library Company of Philadelphia, PA, USA; (add.info.: S. F. Jacoby & Co., Market St. betw. 20th & 21st Philadelphia, Advertisement containing a montage of 5 views of the marble works established in 1855 at 2025 Market Street. Views are separated by borders comprised of filigree, mantles, and sculpture. Upper view shows the exterior of the three-story L-shaped factory.The factory is adorned with a balcony lined with statues, the roof figure of William Penn, and signage. Marble works, predominately monuments, fill the courtyard across from laborers working with a pile of marble slabs near a horse-drawn cart. Also shows street and pedestrian traffic, including a horse-drawn dray parked near the sidewalk and a couple on ... ); 穢 Library Company of Philadelphia ; Library Company of Philadelphia; American, out of copyright.