"Captain, I have not the slightest doubt but that you will. But let it be understood, please, that it's a waste of time as long as I am behind bars."
"Leave that to me," he said and we shook hands.
I was taken back to my cell. I am frank to admit that I didn't sleep much for the next two or three nights. All through my trial and in Barlinney I had been playing a part. When the occasion demanded I could be as cool as I was with Captain Robinson. But that was a strain and it took it out of me. During these following days I was nervous; I had insomnia; I paced my cell at night. The feeling of a jail is cold and thick.
But as I expected, another week brought Captain Robinson again. This time it was late in the evening after all the prisons were shut up tight. The Lieutenant-governor himself took me into the Governor's office. No other warder or prison official observed us.
"Well, Doctor," was the way Robinson greeted me. "I have something definite to propose to you. You can be of use to us. You have still sixteen months of your sentence to serve. Are you willing to give these sixteen months of your time to us--terms to be agreed upon later? I am prepared to supply you with proofs that you were deliberately put away, betrayed by your employers, the German government."
He did so to my complete satisfaction. As I guessed, I had come to learn so much of Germany's affairs that I was dangerous. To betray me in such a way that I would not suspect and squeal was a clever way to close my mouth for seven years in jail or until the Black Forest plans had matured.
"How would you suggest that we go about it?" he asked.
"To be of the slightest degree of use to you, nobody must know of my release," I added. "Here is my suggestion. I must leave the execution of it to you. The impression I conveyed around Edinburgh was that my health is rather indifferent. So it is also believed here in the prison. On those grounds it should be an easy matter for you to have me ostensibly transferred to another prison; instead of which, have me taken wherever you wish to. I see no necessity that outside the Lieutenant-governor, the Governor and yourself, any one need know of it."
"Yes, yes," said Robinson. "That coincides with my own ideas and plans." Presently he departed and I went back again to my cell.
At half-past five the next morning, I was aroused by the Lieutenant-governor. He was alone. There were no warders in sight. In the Governor's office I found all my clothes and effects ready and laid out for me. These I addressed and left with the Lieutenant-governor. We took a taxicab for the Caledonian Station in Glasgow. Few people were abroad in Glasgow at that time of day and there was no danger of recognition. The trip to London was uneventful. At Euston Station we were met by Captain Robinson. We went into a private waiting-room where Captain Robinson signed a paper for the Lieutenant-governor. It was what amounted to a receipt for the prison's delivery of me into his hands. Then the lieutenant-governor left us; then Robinson left, after handing over an envelope containing cash and instructions.