Historical clue formulations

• Phrase popularized by Long John Silver of "Treasure Island" — 2021-11-19
• Stereotypical cry from a sailor — 2020-12-18
• "I don't believe it!," on 27-/44-Across — 2011-09-19
• Cry on a corsair — 2008-11-28
• "Well, I'll be!," as it might be said on September 19 — 2008-09-19
• Pirate's exclamation — 1996-02-20