Historical clue formulations

• Some natural borders en México — 2025-08-17
• Rivers in Portugal and Spain — 2022-12-20
• Ocho ___, Jamaica — 2022-01-20
• ___ de las Amazonas — 2020-11-10
• Rivers, in Mexico — 2020-05-18
• Amazonas and others — 2020-02-27
• Amazonas and Nilo — 2016-04-22
• Ocho ___ (Jamaican resort) — 2014-09-14
• Kia subcompacts — 2013-06-05
• Spanish waterways — 2012-10-08
• Amazonas and others — 2012-09-05
• Amazon and Orinoco, to natives — 2011-05-23
• Spanish rivers — 2010-05-31
• Carriers of water to los océanos — 2009-12-08
• Delgado's rivers — 2008-11-16
• Uruguay and Paraguay — 2008-10-30
• Mexican waterways — 2008-10-05
• Paraguay and others — 2007-01-07
• Ocho ___, Jamaica — 2006-12-13
• Rivers of Spain — 2006-03-27
• Ebro y otros — 2005-01-28
• Paraguay and Uruguay — 2003-06-08
• Mexico's Yaqui and others — 2003-02-16
• Mexican rivers — 2003-02-04
• The Amazon and others — 2001-01-15
• Spanish streams — 1998-10-26
• Guadalquivir et al. — 1998-08-25
• Spanish rivers — 1997-11-03
• Guadalquivir and others — 1997-07-06
• Jamaica's Ocho ___ — 1997-05-30
• Grande and Bravo — 1997-04-14
• Portuguese rivers — 1997-04-03
• Ocho _____, Jamaica — 1994-10-03
• Bravo and Grande — 1993-12-30
• Ocho_____, Jamaica — 1993-12-06