Historical clue formulations

• Vast — 2024-07-20
• Numerous beyond calculation — 2023-03-20
• Not related? — 2017-11-12
• Still a secret — 2006-08-01
• Very large — 2004-03-21
• Countless — 2003-07-31
• Incalculable — 2002-06-16
• Numerous — 2000-05-15
• Countless — 1999-03-12
• Countless — 1998-05-26