"Don't give me any tips, but let me show you what I can do," Irving replied. "If I fall down on this mission, you'll know I'm not the fellow for the job."

"All right," said the colonel. "I've telephoned for Lieut. Osborne to come here and accompany you again. But this time, remember, you are to do the quizzing, and the lieutenant is to report to me how efficiently you went at it."

"I'm glad to be put on my own responsibility, sir, before I drop down from the clouds into the midst of the enemy," the boy said grimly.

CHAPTER XVIII

STUDYING TO BE A SPY

An hour later Lieut. Osborne arrived at the colonel's headquarters, and he and Private Ellis started at once for the field hospital. There they found Hessenburg, alias Tourtelle, much improved physically, but not a little nervous regarding his own rather precarious prospects. Instead of being an officer helping to direct, in his small way, the battle against the autocratic presumption of a great military power, he was something more than an ordinary prisoner of war--a trapped spy, who had conspired with others for the downfall of his own country. With seemingly genuine repentance, he exhibited much eagerness to give all the information possible in order to induce leniency for himself from a court-martial.

"I am instructed by Col. Evans to make this statement to you as coming from him," Irving announced early in the interview: "He desires all the information you can give him regarding your program that was to have been followed if you had succeeded in making your way beyond the enemy lines. He has certain plans in view, the success of which will depend largely on the correctness of your information. If you should misinform him, through us, those plans undoubtedly would fail. Moreover, if any enemy spy should get a tip through you or anybody else, that the information supplied by you was being used to attain important ends, those ends probably would never be reached.

"What we must have from you, therefore, is the truth, and the whole truth. To insure his receiving this, Col. Evans has asked me to inform you that the only thing that can save you is the success of his plan. If the plan fails, he will assume that the blame is yours and you will be shot."

Irving paused a moment, and Hessenburg seized the opportunity offered to interpose thus:

"You mean to say that he will have me shot for something for which I'm not the least responsible?"