Historical clue formulations

• Twain's "celebrated jumping frog" — 2016-10-23
• Frontiersman Boone, informally — 2015-10-16
• Frontiersman Boone, familiarly — 2015-02-24
• ___ Webster, Twain's "celebrated jumping frog" — 2014-03-30
• Twain's "celebrated jumping frog" — 2013-12-28
• Frontiersman Boone, informally — 2012-04-22
• Twain's "celebrated" frog — 2011-12-02
• Relative of Thos. or Wm. — 2010-07-08
• "Young ___ Boone" (short-lived 1970s TV series) — 2009-07-24
• Pioneer Boone, familiarly — 2009-01-07
• Frontier name, for short — 2007-06-24
• Boone, to rustics — 2004-05-11
• Twain's jumping frog — 2004-03-13
• Mark Twain's jumping frog — 2004-01-09
• Frontier nickname — 2003-03-22
• Frontiersman Boone, for short — 1999-10-19
• Twain's celebrated jumping frog — 1997-06-13
• Frontiersman Boone, informally — 1996-10-16
• First name in frontiersmen — 1996-01-19
• Part of Boone's signature — 1994-12-22