KEYSTONE MARBLE WORKS. S.F. Jacoby & Co., Market St. betw. 20th & 21st Phila: Herline & Co., Lith., . Lithograph tinted with two stones, 18-1/2 x 16 inches. Foot trimmed to image, but including publisher's imprint, a few minor chips to head, else very good. Wainwright 213. Philadelphia on Stone 421. 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 horseback, a horse-drawn carriage, a horse-drawn cart, and a laborer pushing a hand-cart in the street. Lower views show the "Cutting Room"; "Saw Room"; "Polishing Room"; and "Show Room." Interior views include laborers at work cutting, polishing, and transporting by h and slabs of marble under the presence of factory managers. Views also show an elegantly-attired couple reviewing mantelpieces in the showroom. Most of the laborers toil at work tables lining the walls. Also contains a vignette depicting the Philadelphia coat of arms. Published in Colton's Atlas of America (New York 1856).