Historical clue formulations

• Clearing — 2023-08-27
• Clearing — 2014-03-08
• Clearing — 2010-10-29
• Expanse — 2010-04-18
• Clearing — 2009-09-25
• Field, e.g. — 2009-09-05
• Clearing — 2007-12-09
• Range, e.g. — 2007-10-13
• Undeveloped expanse — 2004-10-07