We have a good many Spanish workmen in our munition factories and three of these factories have recently been burnt down.

We have the proof now, thanks to you, that those little glass tubes so carefully manufactured in Berlin to last four hours and a half and no more, set the fires going." "Proof, you say ?" Hillyard asked earnestly.

"It is not probability or moral certainty?
It is actual bed-rock proof ?" "Yes.

For once our chemists had grasped how these tubes could be used, we knew what to look for when the workmen were searched on entering the factory.

Two days ago we caught a man.