Related Clues:

• Person like Holmes assimilating unknown language
• Ancient Mexican of extremes, one investigates
• First in American zone that Europeans colonised?
• You need several weeks to acquire a foreign language
• Investigator going after extreme letters from certain old people
• A policeman arrests unknown Mexican
• People of Central America
• Original Mexican native
• Conquered Mexican
• The illusory world of old people
• Language once used by investigator pursuing extremists
• Old Mexican, etc, relocated east of Arizona
• Old Mexican area unknown by investigator
• Ancient occupants of Belize
• Moctezuma, for one