Historical clue formulations

• Arcane letter — 2026-09-06
• Symbol in the Bluetooth logo, for one — 2025-05-07
• Mysterious character — 2024-08-21
• Bit of Old Norse — 2023-07-30
• Ancient alphabet character — 2023-03-21
• Old Norse character — 2023-01-16
• Bit of ancient Viking text — 2022-12-13
• Ancient letter — 2022-11-23
• Magical writing, as in Dungeons & Dragons — 2022-10-25
• Mystical character — 2022-04-06
• Bit of ancient text — 2020-09-20
• Letter in a Viking inscription — 2020-01-27
• Bit of ancient script — 2020-01-19
• It may be set in stone — 2019-10-25
• Part of a Viking message — 2019-03-06
• Tolkien character — 2018-01-17
• It may be carved in stone — 2017-07-28
• Mystical character — 2017-01-04
• Viking character — 2016-11-24
• Enigmatic one in "The Hobbit" — 2016-08-21
• Letter in an Anglo-Saxon script — 2016-06-13
• Tolkien character — 2016-02-12
• Hard-to-read character — 2016-01-12
• It may be written in stone — 2015-11-07
• Character seen in "The Hobbit" — 2015-07-19
• Bit of Old Norse writing — 2015-06-01
• Kylver Stone letter — 2012-11-23
• Letter to Odin? — 2012-09-12
• Character in "The Hobbit" — 2011-10-16
• Dead letter? — 2011-10-09
• Bit of Viking writing — 2011-08-21
• Character in "Beowulf" — 2010-12-16
• Viking letter — 2010-07-08
• Anglo-Saxon writing symbol — 2010-07-05
• Mysterious character — 2010-05-19
• Anglo-Saxon writing symbol — 2009-10-19
• Letter in a mysterious inscription — 2008-08-19
• Old character — 2008-06-14
• Old character — 2007-10-13
• Old Germanic character — 2007-07-15
• Something written in stone — 2006-11-11
• Bit of writing on the wall? — 2005-05-11
• Mysterious writing — 2005-04-25
• Mysterious letter — 2005-04-18
• Something Eric the Red read — 2004-01-02
• Viking letter — 2003-12-29
• Ancient writing — 2003-06-04
• Ancient letter — 2003-04-08
• Old character — 2002-08-25
• Part of an old inscription — 2002-08-18