Historical clue formulations

• Gentle hills — 2026-06-06
• Rises — 2016-02-06
• Small hills — 2013-01-02
• Rolling features of some golf courses — 2010-03-11
• Rounded hills — 2009-12-22
• Small rises — 2009-09-26
• Rounded hills — 2002-12-16
• Gentle hills — 1995-09-04