He is also best known for possibly being the oldest person to appear on television at the time, in the program I've Got a Secret on February 9, 1956 (63 days before his death).

[1] He died April 12, 1956, at the home of his daughter in Arlington, survived by five children, thirteen grandchildren and 35 great-grandchildren.

He remembered that, not understanding what had happened to Lincoln, he was very concerned for Booth, who broke his leg, reputedly, in the jump.

It also noted that there is no documented record proving that Seymour, Sarah Cook, or Mrs. Goldsborough was present at the theatre when Lincoln was shot.

[3] Exactly nine weeks before his death, Seymour appeared on the February 9, 1956, broadcast of the CBS TV panel show I've Got a Secret.