A Guild of Our Own/Quick guide

Walkthrough

 * Talk to Darren Lightfinger.
 * Talk to Chief Thief Robin.
 * Use irit potion (unf) with chopped onion.

Guild Registry

 * In a building southeast of Ardougne market, talk to the Registrar.
 * Pickpocket the Registrar for a key.

Vault key

 * In the other room, wind the clock on wall.
 * With the Registrar in the clock room, go back to the desk.
 * Lure, knock out, then pickpocket the guard.
 * Pull the vault lever behind the desk.
 * Go down the trapdoor.
 * Picklock the vault door.
 * Check the chest for traps, then open it.
 * Inspect the box under the square hole in the wall to exit.
 * Bank the vial of stench (a).

Finishing up

 * Re-enter the building and talk to the Registrar.
 * Return to Darren Lightfinger.
 * Caper complete!