Historical clue formulations

• Stringed instruments of old — 2026-08-04
• U-shaped instruments — 2023-11-02
• Apollo played with them — 2018-06-16
• Instruments played on Mount Olympus — 2018-03-18
• Strummed instruments — 2015-02-13
• Zither cousins — 2012-07-08
• Ancient strings — 2007-02-07
• Instruments played by 3-Down — 2006-01-08
• Cousins of harps — 2004-09-29
• Old strings — 2002-04-14
• Props in ancient Greek art — 2000-04-22
• Plucked instruments — 1998-06-02