sentences:  One of Mary's most notable descendants was William Monroe Trotter, who became a prominent Boston newspaper publisher, human rights activist, and a founder of the Niagara Movement, precursor of the National Association for the Advancement of Colored People (NAACP).Trotter graduated "magna cum laude" from Harvard University in 1895; in his junior year he became the first man of color to earn a Phi Beta Kappa key there.Trotter was a contemporary of fellow Harvard alumnus W. E. B.