William McKinley signed Executive Mansion card, with bold fountain pen signature, ''William McKinley''. Accompanied by a copy of a letter on Executive Mansion stationery, dated 5 September 1901, one day before McKinley's assassination; letter references the enclosed card, likely making this signature one of President McKinley's last. Card measures 4.375'' x 2.75. Light wear and mounting remnants to verso, overall very good.