Historical clue formulations

• Native of the Delaware Valley — 2025-10-19
• Indigenous people of the Delaware Valley — 2024-07-02
• Delaware Valley tribe — 2018-10-30
• Delaware Valley tribe — 2016-01-29
• Delaware Valley Indians — 2014-05-02
• Delaware tribe — 2010-01-21
• The Delaware Prophet's tribe — 2009-06-06
• Delaware tribe — 2005-06-06
• Delaware Indian — 2002-02-07
• Delaware Indian — 2000-04-12
• Delaware Indian — 1994-08-06