Historical clue formulations

• Literary friend of Finn — 2026-04-21
• Twain protagonist — 2023-06-10
• Lumber mill employee — 2016-07-08
• Finn's friend — 2015-04-12
• See 36-Down — 2014-10-21
• Fictional Tom or real-life Diane — 2014-05-26
• Successor to Gibson on "ABC World News" — 2013-07-20
• Twain adventurer — 2013-05-29
• "Tom ___, Detective" (1896 novel) — 2012-04-27
• Twain hero — 1998-01-10
• Finn's pal — 1994-02-22