Grumpy Old Geeks People Samuel J. Seymour Person Samuel J. Seymour 2 mentions in 1 episode A man the speakers identify as the last living witness to Lincoln’s assassination. Mentions 353: Reality Apathy Jun 15, 2019 19:56 Samuel J. Seymour. Yes. And he was the last living person to see Lincoln assassinated. 21:26 Mr. Samuel J. Seymour is buried