Whoever did the job went after it special; and he ain't going to part with his swag without his price.

This must be a case of notice to the pawnbrokers.

There's one good thing about it, anyhow, that the hue and cry needn't be given.
We needn't tell Scotland Yard unless you like; we can work the thing privately.

If you wish to keep the thing dark, as you told me at the first, that is our chance." Mr.Corbeck, after a pause, said quietly: "I suppose you couldn't hazard a suggestion as to how the robbery was effected ?" The Policeman smiled the smile of knowledge and experience.
"In a very simple way, I have no doubt, sir.

That is how all these mysterious crimes turn out in the long-run.