Signature of William Howard Taft.
Traced in Adobe Illustrator from http://cgi.ebay.com/AUTHENTIC-PRESIDENT-WILLIAM-HOWARD-TAFT-AUTOGRAPH-NR_W0QQitemZ270501108370QQcmdZViewItemQQptZLH_DefaultDomain_0?hash=item3efb1f5a92#ht_500wt_1182
William Howard Taft