Historical clue formulations

• Lies atop — 2026-01-14
• Uses as a perch — 2019-03-31
• Uses for support — 2013-07-12
• Uses for a base — 2012-12-29
• Leans against — 2008-04-11
• Has as a foundation — 2008-02-02
• Sits atop — 2006-03-05
• Uses as support — 2003-10-29
• Uses as a basis — 1998-10-23