“I wish to speak to Meadows,” he said to the man who answered him—a police officer who had been stationed at the exchange to answer any call from this connection.

“I will put you through to him,” was the reply.

For a moment the doctor was surprised that Meadows was not at the exchange. He did not know then that a field telephone line had been organized, and that the factory head-quarters of the directing staff was in communication with the world.

It was not Meadows, but another man who answered him, and by his tone of authority Oberzohn guessed that some higher police official than Meadows was on the spot.

“I am the doctor Oberzohn,” he barked. “You have brought a tank machine to attack me. If this approaches beyond the wire fence, I shall place the woman Leicester in the home of the snakes, and there I will bind her and release my little friends to avenge me.”

“Look here——” began the officer, but Oberzohn hung up on him.

He went out and locked the door, putting the key in his pocket. His one doubt was of the loyalty of his companions. But here, strangely enough, he underrated their faith in him. The very mildness of the attack, the seeming reluctance of the soldiers to fire, had raised their hopes and spirits; and when, a quarter of an hour later, they saw the tank turn about and go out into Hangman’s Lane, they were almost jubilant.

“You’re sure that he will carry out his threat?” asked the police chief.

“Certain,” said Leon emphatically. “There is nothing on earth that will stop Oberzohn. You will force the house to find a man who has died by his own hand, and——” He shuddered at the thought. “The only thing to be done is to wait for the night. If Washington arrives on time, I think we can save Miss Leicester.”

From the roof Dr. Oberzohn saw that the soldiers were digging a line of trenches, and sent a spatter of machine-gun bullets in their direction. They stopped their work for a moment to look round, and then went on digging, as though nothing had happened.