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A biography of the free-born black man who, as a self-taught mathematician and astronomer, helped survey the site of the Nation's Capitol and published several popular almanacs.

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Margaret Goff Clark

Margaret Goff Clark

1913 - 2004
American
Author Margaret Goff Clark was born in Oklahoma and grew up in New York state. She wrote mysteries, nature study books, and biographies. Her first boo... See more
Russell Hoover

Russell Hoover

1928 -
American
Russell Hoover, a native Pennsylvanian, is a graduate of the Philadelphia College of Art, and lives in Glenside, Pennsylvania, with his family. He i... See more

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