The Tooth Fairy

A Tooth Fairy was travelling on a train and sitting in the opposite seats were two men. They introduced themselves as a really cheap accountant and an expensive accountant.

The expensive accountant found under his seat a briefcase and, when he opened it, they saw it was crammed full of £50 notes. He left the briefcase on the table in front of the Tooth Fairy.

Suddenly the train entered a tunnel and everything went dark. When the train came out into the daylight, the briefcase had vanished completely. Who had taken the briefcase?

Well, it's obvious really.

It had to be the expensive accountant, because there's no such thing as the Tooth Fairy and there's no such thing as a really cheap accountant either!