On May 26, 1863, Walt Whitman wrote to his mother: "O the sad, sad things I see--the noble young men with legs and arms taken off--the deaths--the sick weakness, sicker than death, that some endure, after amputations...just flickering alive, and O so deathly weak and sick." For nearly three years, Whitman immersed himself in the devastation of the Civil War, tending to thousands of wounded soldiers and recording his experience with an immediacy and...