Thomas Wentworth Higginson, a Unitarian minister, was a fervent member of New England's abolitionist movement, an active participant in the Underground Railroad, and not only corresponded with John Brown before the ill-fated raid on Harper's Ferry, but was part of a group that supplied material aid to Brown. When the Civil War broke out, his reputation, enhanced by his impassioned articles about Denmark Vesey and Nat Turner in the Atlantic, made him...