The most valuable autograph ever sold also happens to be one of the most expensive books and/or manuscripts ever sold. In 2012, George Washington's personal copy of the U.S. Constitution and Bill ...

The rarest and most valuable autograph signed as president is William Henry Harrison, who had the shortest presidency in U.S. history: one month, from March 4, 1841 to April 4, 1841. He defied the ...