arnes sat alone in his cell for hours. The darkness and loneliness wore on him until he felt that his nerves would crack. Not a sound came to him. He threw himself on one of the beds and plugged his ears with his finger tips in an attempt to keep the silence out. Then a cheerful voice sounded in the cell and a friendly hand fell on his shoulder.
"Well, Carnesy, old dear," said Dr. Bird, "have you been lonesome?"
"Dr. Bird!" gasped Carnes in tones of relief. "Are you all right?"
"Right as can be. I learned a lot this afternoon. For one thing, you're going to start flying lessons to-morrow and you're going to do your best to become an expert pilot in a short time. It is the only thing to do."
"And fly a plane for Saranoff?"
"I hope not. The only way to avoid that very thing is to keep your mentality unimpaired so that I can call on you for help when I need it. If the Selom operate on you, you will be useless to me."
"Operate? What do you mean?"
"I'll tell you. The Selom are a very old and highly civilized people. For ages they have possessed scientific knowledge for which the upper-world scientists are now blindly groping. Among other things, they have a perfect knowledge of the workings of the brain. If they operate they will remove from your brain every speck of memory you have of past events, leaving only those things that will be useful to Saranoff. You will be his complete slave. In that condition you will be taught to fly a plane. When the time comes, you will fly one with no remembrance of anything which happened prior to the operation and with no will but his. It will be easier to teach you flying in your natural state if you are willing. You will be willing."