Historical clue formulations

• *Cryptid in the Scottish Highlands — 2024-08-12
• Supposed sighting in the Scottish Highlands — 2024-07-15
• Subject of the so-called "surgeon's photograph" of 1934 — 2022-02-11
• Cryptid of the 115-Across — 2018-12-09
• Subject of this puzzle — 2012-09-25