They bound my wrists behind my back and jerked me roughly to my feet.

I cannot accurately describe my sensations; the unreality of all that had occurred in those few moments left me dazed and uncertain. For at least once in my life, I seemed wholly deprived of the power to reason, possibly because the emergency was so utterly foreign to anything that I had ever before experienced.

Not even the phantom bowmen of Lothar could have presented so unique a situation, for these were visible when they attacked.

As I was jerked to my feet, I glanced about for Jat Or and saw him near me, his hands similarly trussed behind his back.

Now I felt myself being pushed toward the doorway through which Zanda had disappeared, and near me was Jat Or moving in the same direction.

"Can you see anyone, my prince?" he asked.

"I can see you," I replied.

"What diabolical force is this that has seized us?" he demanded.

"I don't know," I replied, "but I feel hands upon me and the warmth of bodies around me."

"I guess we are done for, my prince," he said.

"Done for?" I exclaimed. "We still live."

"No, I do not mean that," he said; "I mean that as far as ever returning to Barsoom. is concerned, we might as well give up all hope. They have our ship. Do you think that even if we escape them, we shall ever see it again, or at least be able to repossess it? No, my friend, as far as Barsoom is concerned we are as good as dead."

The ship! In the excitement of what I had just passed through I had momentarily forgotten the ship. I glanced toward it. I thought that I saw the rope ladder move as though to the weight of an unseen body ascending it.

The ship! It was our only hope of ever again returning to Barsoom, and it was in the hands of this mysterious unseen foe. It must be saved.

There was a way! I centered my thoughts upon the mechanical brain—I directed it to rise and wait above the castle, out of harm's way, until I gave it further commands.

Then the invisible menace dragged me through the doorway into the interior of the castle. I could not know if the brain had responded to my directions.

Was I never to know?

Chapter 17 THE CAT-MAN

My thoughts were still centered upon the brain in the nose of Fal Sivas's ship as I was being conducted through a wide corridor in the castle. I was depressed by the fear that I might not have been able to impart my controlling directions to it at so great a distance or while my brain was laboring under the stress and excitement of the moment. The ship meant so much to us all, and was so necessary to the rescue of Dejah Thoris, that the thought of losing it was a stunning blow; yet presently I realized that worrying about it would do no good, and so I expelled these subversive thoughts from my mind.