Sir Edmund Verney on the face of it a trusted pillar of the realm, was well known to selected members of the criminal underworld as somebody who would make them all sorts of illegal magical items, for the right price. One of these items was the Double Purse, the size and shape of a large bag. If an item was placed in the purse, it would be duplicated, and the thief could then replace the duplicate before anyone noticed and walk away leaving the duplicate in the stolen item’s place. Another criminal trick was for the thief to put a bag of his or her own money in the purse and then spend the duplicated money instead of the real money.
This duplicated money will last for 24 hours before fading away to nothing, sometimes leading to a totally innocent person being suspected of theft. Larger items will last for several hours before fading away and will be solid until then, giving the thief enough time to escape. The replacement for a magical item stolen in this way will still keep a magical aura and in fact will still have enough magic in it for one use, which then makes it vanish on the spot after being used. Food and drink swapped in this way, if eaten or drunk before vanishing, will fill the stomach or quench the thirst for a short time, before vanishing and leaving the person hungrier or thirstier then before. Clothes, armour or weapons will last until they vanish, which can be dangerous in a battle or highly embarrassing at other times.
One thing that cannot be duplicated is anything living or undead, as the bag cannot give anything life or unlife.
The bag was uncovered when someone tried to use it to steal the Ruby Sceptre and was stolen by an expert thief from the police strong room as it was so useful in the service of crime.