Andrew Ellicott
Andrew Ellicott was a surveyor employed by President George Washington to survey the boundary lines of the federal Territory of Columbia, which became the District of Columbia. His survey team included his younger brother Joseph and <a href="http://mallhistory.org/items/show/77">Benjamin Banneker</a>, a self-taught African American surveyor. The team laid the boundary stones of the 100-square mile borders of the District. Ellicott also completed and revised the original city plan of <a href="http://mallhistory.org/items/show/82">Pierre Charles L'Enfant</a>.
<a href="/items/browse?advanced%5B0%5D%5Belement_id%5D=39&advanced%5B0%5D%5Btype%5D=is+exactly&advanced%5B0%5D%5Bterms%5D=Andrew+Ellicott">Andrew Ellicott</a>
New York Public Library. <a href="http://digitalgallery.nypl.org/nypldigital/id?1228539">View original image</a>.
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Benjamin Banneker
Banneker was a free African American surveyor, mathematician, and almanac author from Maryland. In 1791, he assisted <a href="http://mallhistory.org/items/show/105">Andrew Ellicott </a>with a survey of the boundaries of the District of Columbia. Among his duties on the survey, <a href="http://mallhistory.org/items/show/514">Banneker</a> operated the astronomical equipment which helped the surveyors determine their exact location.
<a href="/items/browse?advanced%5B0%5D%5Belement_id%5D=39&advanced%5B0%5D%5Btype%5D=is+exactly&advanced%5B0%5D%5Bterms%5D=Benjamin+Banneker">Benjamin Banneker</a>
Maryland Historical Society. <a href="http://www.mdhs.org/digitalimage/cover-benjamin-bannakers-sic-pennsylvania-delaware-maryland-and-virginia-almanac-year-1">View original</a>.
<a href="/items/browse?advanced%5B0%5D%5Belement_id%5D=38&advanced%5B0%5D%5Btype%5D=is+exactly&advanced%5B0%5D%5Bterms%5D=Pre-1800s">Pre-1800s</a>