“I know it; therefore I shall have to play the part of the German officer.”

“But he knows you also.”

“True; but I shall be disguised. I have such a disguise as I am sure he will never penetrate. But I fear that he will know you the moment he lays eyes on you.”

“There is no doubt about that. What shall I do?”

“I guess you will have to remain behind.”

At this moment Jack broke into the conversation.

“Can’t I take his place?” he asked. “He won’t know me, that’s sure.”

“By Jove!” declared Hetherington. “I believe you can. What do you say, Edwards?”

The lieutenant hesitated.

Jack noted his uncertainty.