vault
Beneath the Umbrarium, down a stair of ninety steps, run the vaults in which pledged shadows are kept: long brick corridors, whitewashed, each with its own lamp set at the same height and angle, so that every shadow stands on the wall as it stood when it was taken, pinned at the heel with a brass tack and a chalk number. One thousand one hundred and four shadows stand here tonight. If a lamp goes out the shadow on its wall goes stray, and so the lamps are trimmed in an unbroken rota by the Lamp-...
Located in The Ledger of Shadows.