Historical clue formulations

• Jewelry stores? — 2020-07-11
• Valuable discoveries — 2011-12-06
• Treasure hunters' finds — 2004-10-22
• Storehouses — 2001-01-14
• Collections — 2000-06-01
• Pirates' stashes — 1998-12-31
• Treasured spots? — 1997-10-16