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>. <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>