Historical clue formulations

• Explorer from 63-Across — 2023-11-01
• Alliterative "Doctor" of children's literature — 2021-09-15
• Old automaker with the models Firedome, Fireflite and Firesweep — 2021-09-03
• Onetime division of the Chrysler Corporation — 2019-03-14
• Contemporary of Pizarro — 2018-11-28
• Mississippi River explorer — 2017-10-10
• Old car named for an explorer — 2017-04-23
• Spaniard granted the right to conquer Florida by Charles V — 2016-03-31
• See 52-Down — 2015-01-04
• Auto sponsor of Groucho Marx's "You Bet Your Life" — 2014-05-04
• Pizarro contemporary — 2013-07-12
• Fireflite of the 1950s, e.g. — 2013-05-04
• First European to cross the Mississippi — 2013-01-18
• Old Chrysler make — 2012-06-22
• Studebaker alternative — 2009-08-29
• He joined Pizarro in the conquest of the Inca Empire — 2009-03-13
• Car famous for its 1950s tailfins — 2007-06-17
• Nash contemporary — 2006-10-06
• Mississippi River explorer — 2004-08-02
• Spanish explorer who discovered the Mississippi — 2004-06-15
• Mississippi River explorer — 2003-06-14
• 1950's Firedome — 2003-06-05
• Mississippi River explorer — 2002-12-29
• Firedome or Adventurer — 2002-07-26
• Mississippi River discoverer — 2002-01-18
• Firedome, for one — 2001-11-30
• Bygone car — 1999-12-05
• 50's FireFlite — 1998-01-17
• Mississippi River explorer — 1997-08-23
• Old Chrysler make — 1995-10-04
• Nash competitor — 1995-06-18
• Explorer of Florida, 1539 — 1995-01-22
• Mississippi discoverer — 1994-05-05