Of the three secretaries who assisted President Abraham Lincoln-John G. Nicolay, John Hay, and William O. Stoddard-only Stoddard wrote an extended memoir about his time in the Executive Mansion. First published in 1890, the book vividly depicts the president's agonizing reaction to the defeats at Fredericksburg and Chancellorsville, the difficulties encountered (and presented) by Mary Lincoln, the president's relations with George B. McClellan and...