George Ade, one of the most beloved writers of his day, carried on a lively correspondence with the most colorful of the great and near-great. George M. Cohan, William Howard Taft, Theodore Roosevelt, John T. McCutcheon, James Whitcomb Riley, Finley Peter Dunne, Hamlin Garland all received letters from the Hoosier humorist. Ade's keen observation, compact and straightforward style, and understated humor mark his correspondence, as well as his immensely...