"Harriet Tubman--no-nonsense, funny, uncannily prescient, and strategically brilliant--was one of the most important conductors on the underground railroad and hid the enslaved men, women and children she rescued in the basement kitchens of Martha Wright, Quaker mother of seven, and Frances Seward, wife of Governor, then Senator, then Secretary of State William H. Seward. Harriet worked for the Union Army in South Carolina as a nurse and spy, and...