Statistics for occurrence #1 of “United States” in entry ellicott-andrew of Harper's Encyclopedia of United States History:

...engaged in public surveying for many years after settling in Baltimore in 1785. In 1789 he made the first accurate measurement of Niagara River from lake to lake, and in 1790 he was employed by the United States government in laying out the city of Washington. In 1792 he was made surveyor-general of the United States, and in 1796 he was a commissioner to determine the southern boundary between the territor...
Max. Freq. Min. Freq.
Entity Corpus Doc Corpus Doc  
United States (United States) 100,886 16,340 0 0 0 user votes
United States (New Mexico, United States) 6 0 0 0 0 user votes

† This entity has been selected by the automated classifier as the most likely match in this context. It may or may not be the correct match.