WATSON
Yes, I know. But would you believe that you can't borrow a decent pair of trousers in this place?
WATSON
Whenever he starts whistling, I know he's getting close to a solution.
HOLMES
It's nothing new, actually. We've come across this situation before.
WATSON
We have? Where?
HOLMES
At the ballet. There's a lake -- and there's a castle -- and there's…