Jack-in-Irons is a fearsome, spectral giant from Yorkshire folklore, a malevolent spirit that haunts lonely roads, known for being covered in chains, wielding a spiked club, and collecting the heads of travellers as gruesome trophies, representing primal fears of the dark and unknown, akin to a bogeyman but with ghostly powers.

Key Characteristics
- Appearance: A large, hideous, often hairy humanoid figure clad in heavy chains, sometimes with pig-like features or tusks.
- Weapon: A massive, spiked club used to bludgeon victims.
- Trophies: He wears the severed heads of those he kills as gruesome trophies, often displayed on his chains.
- Nature: Cruel, sadistic, and terrifying, he embodies the dangers of lonely roads, combining giant strength with supernatural, ghost-like abilities.
Folklore Significance
- Bogeyman Figure: He serves as a cautionary tale for travelers, a terrifying presence representing dangers like bandits, wild animals, or the unknown.
- Ghost Giant: He's considered a "ghost giant" or undead entity, distinct from traditional giants, adding ghostly powers to his immense physical threat.
- Name Origin: "Jack" might just be a generic term for an unknown man (like "John Doe"), while "Irons" refers to his shackled state and trophy display.