Historical clue formulations

• South African currency — 2025-07-24
• Writer Ayn — 2023-11-12
• 100 cents, in Africa — 2023-07-29
• Writer who founded Objectivism — 2022-08-19
• South African currency — 2021-11-10
• £ : pound sterling :: R : ___ — 2021-09-24
• "The Virtue of Selfishness" essayist, 1964 — 2021-02-19
• McNally's partner — 2020-05-20
• South African money — 2020-05-17
• South African currency — 2020-01-26
• ___ McNally (mapmaker) — 2019-12-17
• South African money — 2019-04-30
• Cape Town coin — 2018-10-25
• Kentucky senator Paul — 2018-06-11
• ___ McNally (mapmaker) — 2017-09-11
• "Atlas Shrugged" author Ayn — 2017-07-03
• Partner in mapmaking — 2016-05-21
• South African money — 2015-10-29
• Ayn who wrote "Atlas Shrugged" — 2014-12-08
• Name on many a road map — 2014-08-05
• Pioneering map publisher William — 2014-01-31
• Ayn who wrote "Atlas Shrugged" — 2012-11-05
• South African money — 2011-11-22
• Kentucky senator Paul — 2011-02-02
• Capital of East London — 2009-09-26
• Author Ayn — 2009-06-08
• 100 cents, in East London — 2009-03-13
• Pretoria money — 2009-03-11
• Cape Town currency — 2008-12-30
• Ayn who wrote "Atlas Shrugged" — 2008-08-11
• Money in Pretoria — 2007-04-11
• Cape Town currency — 2006-07-17
• Money in South Africa — 2005-11-21
• Sperry's partner — 2005-01-26
• Cape Town coin — 2005-01-19
• Money in Port Elizabeth — 2004-06-06
• Coin with the image of a springbok — 2003-02-15
• South African gold discovery site, with "the" — 2002-08-08
• African money — 2002-02-22
• 100 cents — 2002-01-26
• "We the Living" author — 2001-06-28
• Big name in mapmaking — 2001-03-10
• "The Virtue of Selfishness" author — 2000-10-13
• "The Fountainhead" author — 2000-02-04
• South African money — 1999-04-20
• Big name in cartography — 1998-06-12
• "We the Living" author — 1998-01-23
• South African currency — 1997-12-10
• Big name in mapmaking — 1997-11-20
• 100 cents abroad — 1997-10-18