“Now, Watson, we are at the last lap of our little journey,” said Holmes when we were back in the roar of central London once more. “I think we had best clear the matter up at once, and it would be well that you should come with me, for it is safer to have a witness when you are dealing with such a lady as Isadora Klein.”

We had taken a cab and were speeding to some address in Grosvenor Square. Holmes had been sunk in thought, but he roused himself suddenly.

“By the way, Watson, I suppose you see it all clearly?”

“No, I can’t say that I do. I only gather that we are going to see the lady who is behind all this mischief.”