"The Washington Monument, A Technical History and Catalog of the Commemorative Stones". Due to the large size of the original file it has been broken into smaller manageble size files (PDF's).
Did You Know?
In the early 1800's at least half of the population of Prince George's County, Maryland, was enslaved African Americans. Oxon Hill Farm is located in Prince George's County and seventeen enslaved people lived on the property in the 1800s.