2 pages, 4to, ruled paper. Transcribed, witnessed and counter-signed by Vincent T. Haggerty, M. J. O'Laughlin and John Martin." /> [McKINLEY, William, <I>President</I>--ASSASSINATION]. CZOLGOSZ, Leon F. (1873-1901), <I>Presidential Assassin</I>. Manuscript document signed twice ("Leon F. Czolgosz"), comprising the final two-pages of a signed confession to the McKinley assassination. [Buffalo, N.Y.], 6 September 1901. <I>2 pages, 4to, ruled paper</I>. Transcribed, witnessed and counter-signed by Vincent T. Haggerty, M. J. O'Laughlin and John Martin. | Christie's