Underground Railroad Marker ID: 45 | This file appears in: Harrisburg's Role in the Underground Railroad A historical marker at Walnut St. and Commonwealth Ave. acknowledging the role of the Tanner's Alley Neighborhood in the Underground Railroad. | Creator: William Pfingsten | Date: March 21, 2008 | Source: Historical Marker Database | Rights: Historical Marker Database Download Original File CreatorWilliam PfingstenSourceHistorical Marker DatabaseDateMarch 21, 2008RightsHistorical Marker Database "Underground Railroad Marker" appears in: Harrisburg's Role in the Underground Railroad