August 19
1791—Benjamin Banneker writes a letter to Secretary of State (later president) Thomas Jefferson denouncing slavery. In his letter, Banneker declared, “I freely and cheerfully acknowledge that I am of the African race” and then precedes to label America’s recently achieved freedom from England a “hypocrisy” as long as Blacks continued to suffer under “groaning captivity and cruel oppression.” Banneker was a Black activist against slavery even though he is generally recognized for his mathematical achievements, designing one of the first clocks made in America and laying out the nation’s capital after Pierre L’Enfant abandoned the job.