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Open daily 10 a.m. to 5:30 p.m.
Admission is always free!
2 Massachusetts Ave., N.E. Washington, DC 20002
The museum's main entrance is located on the corner of First Street and Massachusetts Avenue NE. Other entrances have variable hours.
This Overland Mail book is a primary source. What makes it a primary source? Click on the image, look for all of the clues, and state your reasons to explain why.