MARTHA E. TYSON. The signature of Benjamin Banneker, a free African American astronomer, mathematician, surveyor, almanac author and farmer. . Banneker the Afric-American Astronomer. From the posthumous papers of M. E. Tyson. Friends' Book Association: Philadelphia, 1884. The signature of a letter to Thomas Jefferson. Source: 10882.aa.5, frontispiece.
The signature of Benjamin Banneker, a free African American astronomer, mathematician, surveyor, almanac author and farmer. . Banneker the Afric-American Astronomer. From the posthumous papers of M. E. Tyson. Friends' Book Association: Philadelphia, 1884. The signature of a letter to Thomas Jefferson. Source: 10882.aa.5, frontispiece.