On several of the faction cards, the storylets associated with the "Counting down the days" quality make mention of a mysterious currency called "Hell’s Teeth". Is this a term for First City coins, or is it referring to something different? Are Hell’s Teeth mentioned anywhere else? Consider:
[spoiler]
The Infernal Sommelier (from Burning Shadows: The Devils of London)
'It’s not really my field, but something my patrons keep mentioning. Do watch out for any little white glowing stones you see. Not gemstones, but singlular little stones that give off a dim light. I’ve heard some wags call them Hell’s Teeth…
The Savage Docker (from By the River’s Side: The Docks)
The Savage Docker […] says, 'You seen them little shining rocks, […] just glow a bit like beetles? Heard ‘em called Hell’s Teeth. No idea why. The things come from the Elder Continent, way I heard it.’
The Acquisitive Reliquarian (from Altars and Alms-Houses: The Church)
‘Do keep your eyes out for any little glowing stones. White, most likely, and not cut like a gemstone. The Church has a great interest in these things. They’re called Hell’s Teeth, but I don’t think you’re quite ready to know why just yet.’
Listen to them (from Fun with the Fisher-Kings storylet in the Flit)
‘…an’ when ‘e climbed up onter the roof, there was the stash, right enough. But it weren’t money like ‘e thort. It were little chunks of stone, wot were glowin’…’ [/spoiler]