The man who assassinated President McKinley. Aside from Czolgosz' signed confession which was recently auctioned at Christie's for $110,500, this is the only known signature in private hands of the man who shot McKinley at the 1901 Pan-American Exposition. This signed note sheet was obtained from the niece of Deputy Sheriff Otto Welker (Erie County [Buffalo] New York) who accompanied Czolgosz on the trip to his execution in Auburn, New York. On 3½"x6" lined note sheet with date and hour noted. This signature is featured in Charles Hamilton's slip-cased set of American Autographs, Volume 2, page 511.