Accompanies Major Andrew Ellicott to the banks of the Potomac River to assist in the survey of the new federal city that would become the nation’s capital. In his free time Banneker begins to write the Pennsylvania, Delaware, Maryland, and Virginia Almanac and Ephemeris. The almanac included information on medicines and medical treatment, and listed tides, astronomical information, and eclipses calculated by Banneker himself. He published the journal annually from 1791 to 1802.
