Mr. Samuel J. Seymour, the last living eyewitness to the assassination of President Abraham Lincoln at Ford's Theater in Washington, D.C. was the mystery guest on the February 8, 1956 episode of the I've Got a Secret game show. Mr. Seymour (March 28, 1860 â April 12, 1956) was actually 95 years of age at the time of this appearance instead of 96. Host: Garry Moore Panelists from left to right: Bill Cullen, Jayne Meadows, Henry Morgan, Lucile Ball