Benjamin Banneker, a free African-American man, was born in Maryland in 1731. Largely a self-educated farmer, he became a mathematician, astronomer, inventor, writer, and surveyor. In 1761 he built a wooden clock by hand that kept precise time. He learned astronomy and predicted eclipses. He compiled almanacs and became the first black man to be published. He was a member of the commission chosen by George Washington that laid out the plans for the capital city of Washington DC. Banneker wrote a letter to Thomas Jefferson attacking slavery. He is now considered America's first major black man of science.Blue, Rose is the author of 'Benjamin Banneker Mathematician and Stargazer' with ISBN 9780761318057 and ISBN 0761318054.