A clue may be dumb in London and shout aloud at Baghdad.' 'That's just the point I was coming to.

Sir Walter says this thing is about as important for our cause as big guns.

He can't give me orders, but he offers the job of going out to find what the mischief is.

Once he knows that, he says he can checkmate it.

But it's got to be found out soon, for the mine may be sprung at any moment.