He must be destroyed, not alone for the sake of Helium, but for the sake of all Barsoom; this mad mind must be removed if I found that it was impossible to direct or cajole it to my own ends. I determined, however, to omit no sacrifice that might tend to bring about a satisfactory conclusion to this strange adventure. I knew that mad minds were sometimes fickle minds and I hoped that in a moment of insane caprice Phor Tak might reveal to me the secret of the Flying Death and the compound of invisibility. This hope was his temporary reprieve from death; its fulfillment would be his pardon, but I knew that I must work warily—that at the slightest suggestion of duplicity, Phor Tak's suspicions would be aroused and that I should then be the one to be destroyed.

I tossed long upon my sleeping silks and furs that night in troubled thought and planning. I felt that I must possess these secrets; yet how? That they existed within his brain alone, I knew, for he had told me that there were no written formulas, or plans or specifications for either of them. Somehow I must wheedle them out of him and the best way to start was to ingratiate myself with him. To this end I must further his plans insofar as I possibly could.

Just before I fell asleep my thoughts reverted to Sanoma Tora and to the urgent mission that had led me to enter upon what had developed into the strangest adventure of my career. I felt a twinge of self reproach as I suddenly realized that Sanoma Tora had not been uppermost in my mind while I had lain there making plans for the future, but now with recollection of her a plan was suggested whereby I might not only succor her but also advance myself in the good graces of Phor Tak at the same time, and, thus relieved, I fell asleep.

It was late the following morning before I had an opportunity to speak with the old inventor when I immediately broached the subject that was uppermost in my mind. "Phor Tak," I said, "you are handicapped by lack of knowledge of conditions existing in Jahar and the size and location of the fleet. Nur An and I will go to Jahar for you and obtain the information that you must have if your plans are to be successful. In this way, Nur An and I will also be striking a blow at Tul Axtar while we will be in a position to attend to those matters which require our presence in Jahar."

"But how will you get to Jahar?" demanded Phor Tak.

"Could not you let us take a flier?" I asked.

"I have none," replied Phor Tak. "I know nothing about them. I am not interested in them, I could not even build one."

To say that I was both surprised and shocked would be putting it mildly, but if I had previously entertained any doubts that Phor Tak's brain was abnormally developed, it would have vanished with his admission that he knew nothing about fliers, for it seemed to me that there was scarcely a man, woman or child in any of the flying nations of Barsoom but could have constructed some sort of a flier.

"But how without fliers did you expect to transport The Flying Death to the vicinity of the Jaharian fleet? How did you expect to demolish the palace of Tul Axtar, or reduce the city of Jahar to ruins?"

"Now that you and Nur An are here to help me, I can set my slaves to work under you and easily turn out a dozen torpedoes a day. As these are completed they will immediately be launched and eventually they will find their way to Jahar and the fleet. Of that there is no doubt, even if it takes a year they will eventually find their prey."