463789 Steam tugs, Columbus and Alert, printed by Thomas S. Sinclair (c.1805-1881), c.1855 (litho tinted with two stones) by Rease, W.H. & Schell, F. (19th century); 32 x 45 cm; Library Company of Philadelphia, PA, USA; (add.info.: Vessels of all classes towed to and from sea and about the harbor; towing to and from Schuylkill and all other descriptions promptly attended to. S. Flanagan No. 78 South Delaware Avenue. Advertisement for two tug boats, Columbus and Alert, depicting in the foreground the Columbus tugboat breaking the ice with a square-rigged ship in tow. Foggy view includes the helmsperson in the wheelhouse, and a man swinging open a door on the port side of the cabin. The steam tug, Alert, is visible in the left background, along with the horizon of Philadelphia. Unclear whether this scene is on the Delaware River or Schuylkill River. ); 穢 Library Company of Philadelphia ; Library Company of Philadelphia; American, out of copyright.