Source Data Reference for:

City = Washington
Time = 1800

City	Year	Size	Size Comment	Year Comment	Author	Title	Location
Washington	1790		founded		n/a	http://en.wikipedia.org/wiki/List_of_North_American_cities_by_year_of_foundation	n/a
Washington	1800	3,200			Jan Lahmeyer	http://www.populstat.info/	n/a