Historical clue formulations

• Early Nahuatl speaker — 2019-06-07
• Pre-Columbian civilization — 2016-12-23
• Ancient Mexican — 2013-11-10
• Ancient resident of Mexico's Cholula — 2010-11-12
• Pre-Aztec Indian — 2005-02-06
• Ancient Mexican — 2003-03-12
• Ancient Mexican — 1996-07-18
• Ancient Mexican — 1995-10-01