Ellicott, Andrew,  and Thackara & Vallance.  "Plan of the city of Washington in the territory of Columbia, ceded by the states of Virginia and Maryland to the United States of America, and by them established as the seat of their government, after the year MDCC."  Map.  1792.  Norman B. Leventhal Map & Education Center,  https://collections.leventhalmap.org/search/commonwealth:z603vs02d (accessed October 26, 2020).