The collection consists of letters from celebrities in various fields, largely addressed to Harry Harkness Flagler. Included are letters of Ambrose Bierce, Thomas A. Edison, Edwin Forrest, Andrew Jackson, Rudyard Kipling, Richard Mansfield, John D. Rockefeller, Franklin D. Roosevelt, John Ruskin, Constantin Stanislavsky, and George Washington. Especially noteworthy are five letters of Charles Dickens, bound together in one volume.