The spy bit his lips in order to keep back a roar of pain.
The paper had rolled upon the ground and several hands at once tried to pick it up.

A petty officer smoothed it out before examining it.

It was a piece of thin paper sketched with the outline of the Mediterranean.
The entire sea was laid out in squares like a chess board and in the center of each of these squares there was a number.

These squares were charted sections whose numbers made the submarines know, by wireless, where they were to lie in wait for the allied vessels and torpedo them.
Another officer explained rapidly to the people crowding close, the importance of the discovery.

"Indeed he was a spy!" This affirmation awakened the joy of capture and that impulsive desire for vengeance that at certain times crazes a crowd.
The men from the boats were the most furious, for the very reason that they were constantly encountering the treacherous submarine traps.