Historical clue formulations

• Mr., Ms. or Mrs. — 2026-05-11
• Mr. or Mrs. — 2026-01-31
• "On the Road Again," for one — 2025-09-23
• Museum placard info — 2024-08-27
• Prominent feature of a jacket — 2024-08-24
• Line on a spine — 2023-09-03
• Noble designation — 2022-11-22
• Count, e.g. — 2022-07-31
• "Us," "It" or "Her" — 2022-01-02
• Line on a spine — 2021-12-08
• Library catalog listing after "author" — 2021-05-24
• Mister President or Madam Speaker — 2021-04-20
• Part of a promotion negotiation — 2021-04-02
• Something typically found on a spine — 2020-08-12
• Queen or knight — 2020-05-09
• Championship — 2020-04-03
• Auto owner's proof — 2019-09-08
• Mr. or Mrs. — 2019-07-17
• Miss, e.g. — 2018-10-27
• World champion, e.g. — 2018-07-04
• Duke or dame — 2017-03-21
• Dr. or Mr. — 2017-02-08
• Boxer's reward — 2016-12-18
• Lady, for one — 2016-04-22
• President-elect, e.g. — 2016-02-15
• Her Royal Highness, e.g. — 2015-09-21
• With 54-Down, song with the same name as its album — 2015-01-21
• Duke or duchess — 2015-01-05
• Proof of purchase — 2014-03-01
• Championship — 2013-09-03
• Give a name to — 2013-04-09
• It might appear on a spine — 2012-11-25
• King or queen — 2012-05-30
• Sir or madam — 2012-04-18
• Duke or duchess — 2012-02-28
• "Annie" or "Annie Hall" — 2012-02-27
• Info in a library search request — 2012-01-30
• Sir or madam — 2011-07-19
• Sir or madam — 2010-08-26
• Bibliographical datum — 2009-12-21
• See 13-Across — 2009-08-27
• "Pajama Party," e.g. — 2009-02-08
• Lord, e.g. — 2009-02-01
• "A Visit From St. Nicholas," e.g. — 2008-12-07
• Heavyweight champion of the world, e.g. — 2008-07-02
• Get a handle on? — 2007-10-26
• Dom or earl — 2007-10-10
• Sir or madam — 2007-09-10
• A challenger might go after one — 2007-06-22
• King or queen — 2007-02-04