| Camera Maker | Canon | Camera Model | Canon EOS-1Ds Mark III |
| Aperture | f/2.8 | Color Space | Uncalibrated |
| Exposure Value | 0 EV | Exposure Program | Manual |
| Exposure Time | 1/80 sec | Flash | No Flash |
| Focal Length | 55 mm | ISO | 1600 |
| Metering Mode | Pattern | Date/Time | 2010:03:11 14:44:43 |
| Copyright | © 2010 Jason O. Watson. All rights reserved. | Orientation | 1: Normal (0 deg) |
| Resolution Unit | Inch | X Resolution | 240 dots per ResolutionUnit |
| Y Resolution | 240 dots per ResolutionUnit | Compression | Jpeg Compression |
| Exposure Mode | 1 | Keywords | travel United States of America United States America USA US Pennsylvania PA Philadelphia County Philadelphia history historical historic historical marker famous landmark road side highway popular Place of Interest Places of Interest Tourist Attraction Tourist Attractions Tourist Destination Tourist Destinations Travel Destination Travel Destinations tour tourism tourist attraction destination Sign Signs American Day Daytime Historical Sites Vertical Education Historical Site Marker Markers Outdoor Outdoors Outside Road Road Signs Roadside Roadsign information display Robert Mara Adger African-American African American black businessman activist bibliophile Philadelphia Building and Loan Association antislavery slavery Afro-American Historical Society historic marker historic site no people nobody sign with text |
| Caption | Robert Mara Adger (1837-1910) Businessman, activist, bibliophile lived here. Director, Philadelphia Building & Loan Assn., pioneering Black firm. Amassed and donated a major collection of rare books, pamphlets on Blacks, antislavery. Founded Afro-American Historical Society. Pennsylvania Historical and Museum Commission 1992 |