Fal Sivas studied me intently for a moment. "Are you not a little too well educated for your calling?" he asked.

"One may never know too much," I replied.

"One may know too much here," he said, and I recalled what the girl had told me.

His tone changed. "I stopped in to see if everything was all right with you, if you were comfortable."

"Very," I replied.

"You have not been disturbed? No one has been here?"

"The house seems very quiet," I replied. "I heard someone laughing a short time ago, but that was all. It did not disturb me."

"Has anyone come to your quarters?" he asked.

"Why, was someone supposed to come?"

"No one, of course," he said shortly, and then he commenced to question me in an evident effort to ascertain the extent of my mechanical and chemical knowledge.

"I really know little of either subject," I told him. "I am a fighting man by profession, not a scientist. Of course, familiarity with fliers connotes some mechanical knowledge, but after all I am only a tyro."

He was studying me quizzically. "I wish that I knew you better," he said at last; "I wish that I knew that I could trust you. You are an intelligent man. In the matter of brains, I am entirely alone here. I need an assistant. I need such a man as you." He shook his head, rather disgustedly. "But what is the use? I can trust no one."

"You employed me as your bodyguard. For that work I am fitted. Let it go at that."

"You are right," he agreed. "Time will tell what else you are fitted for."

"And if I am to protect you," I continued, "I must know more about your enemies. I must know who they are, and I must learn their plans."

"There are many who would like to see me destroyed, or destroy me themselves; but there is one who, above all others, would profit by my death. He is Gar Nal, the inventor." He looked up at me questioningly.

"I have never heard of him," I said. "You must remember that I have been absent from Zodanga for many years."

He nodded. "I am perfecting a ship that will traverse space. So is Gar Nal. He would like not only to have me destroyed, but also to steal the secrets of my invention that would permit him to perfect his; but Ur Jan is the one I most fear, because Gar Nal has employed him to destroy me."

"I am unknown in Zodanga. I will hunt out this Ur Jan and see what I can learn."

There was one thing that I wanted to learn right then, and that was whether or not Fal Sivas would permit me to leave his house on any pretext.

"You could learn nothing," he said; "their meetings are secret. Even if you could gain admission, which is doubtful, you would be killed before you could get out again."