Chester's heart beat rapidly. Could it be that he was once again to escape death when he was sure that his last moment had come? But he replied in a steady voice:
"I saved your life? Where? When?"
With a quick move the man lifted his mask from his face.
"Do you remember now?" he demanded.
The face was that of the man with whom Hal had fought in the farmhouse—the home of Edna Johnson—some days before. Chester recognized him immediately as the German officer who had led his men to the attack in the farmhouse.
But Chester had not spared the man's life. He had not even fought with him. It was Hal who had refused to give the German his death-thrust when the latter was at his mercy. Chester thought quickly.
"He has mistaken me for Hal," he told himself, "and if he knew it he would probably kill me at once. I must keep up the game."
He replied to the German's question:
"Yes, I do remember you now."
"Then you see why it is I cannot kill you," said the German; "but neither can I let you go free. For if I did you would consider it your duty to inform the Belgian commander of what you have learned and thus frustrate our plans. I don't know what to do with you."