There was a cry of pain from the intruder and then a sharp burst of flame as a bullet scarred the top of the desk which shielded Bob.

Bob went cold all over. There was no more fun in this thing. It was deadly serious now and he knew that his very life might depend on the events of the coming minutes for this man was cornered and capable of shooting his way out if necessary.

Chapter VII
SIRENS IN THE NIGHT

As the echoes of the shot died in the room, Bob realized that he had been foolish in throwing the inkwell. It had unduly alarmed the other man and placed his own life in jeopardy. The slug from the gun had come much closer than Bob wanted it to.

There was only one consolation. The shot should attract the attention of the guards on duty in the building and within a minute they should be at the door, battering their way in. Against superior numbers Bob felt that the intruder would not put up a resistance with gun play.

Bob stared at the windows. The head and shoulders of the unknown had disappeared and the distant noises of the street were clearer now, drifting in through the broken window.

Merritt Hughes should arrive at almost any minute and Bob felt that the wise and sensible thing now was to play as safe as possible and await the arrival of help.

Crouched down between the desks, he was in a position to watch the file with the radio documents and he knew that if they were molested he would fight with all his strength to protect them.

As the seconds passed into minutes Bob felt his muscles tensing and his nerves becoming tighter.

There was no sound in the room; there had been no sound since the echoes of the shot had died away. Had his missile disabled the other man; had the shot been fired involuntarily? They were questions he couldn’t answer.