Will-o'-the-wisp - Wikipedia
https://en.wikipedia.org/wiki/Will-o%27-the-wisp
In folklore, a will-o'-the-wisp, will-o'-wisp, or ignis fatuus (Latin for 'foolish flame'; pl. ignes fatui), is an atmospheric ghost light seen by travellers at night, especially over bogs, swamps or marshes. The phenomenon is known in much of European folklore by a variety of names, including jack-o'-lantern, friar's … See more
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