Historical clue formulations

• ___ Finn — 2025-12-23
• With 19-Across, pal of Tom Sawyer — 2021-04-27
• Pap's son, in literature — 2011-06-25
• Literary pal of Tom — 2007-12-21
• 1884 literary hero, informally — 1997-08-24
• Twain hero — 1994-01-20