The interior arrangement was slightly different from that of Fal Sivas's, nor was the cabin as richly furnished.

From the cabin, I stepped into the control room. No one was there. Then I searched the after part of the ship. The entire craft was deserted.

Returning to the ground, I reported my findings to Jat Or and Zanda.

"It is strange," remarked Jat Or, "that no one has challenged us or paid any attention to our presence. Can it be possible that the whole castle is deserted?"

"There is something eerie about the place," said Zanda, in low, tense tones.

"Even the silence seems fraught with suppressed sound. I see no one, I hear no one, and yet I feel—I know not what."

"It is mysterious," I agreed. "The deserted appearance of the castle is belied by the well-kept grounds. If there is no one here now, it has not been deserted long."

"I have a feeling that it is not deserted now," said Jat Or. "I seem to feel presences all around us. I could swear that eyes were on us—many eyes, watching our every move."

I was conscious of much the same sensation myself. I looked up at the windows of the castle, fully expecting to see eyes gazing down upon us; but in none of the many windows was there a sign of life. Then I called aloud, voicing the common peace greeting of Barsoom.

"Kaor!" I shouted in tones that could have been heard anywhere upon that side of the castle. "We are travellers from Barsoom. We wish to speak to the lord of the castle."

Silence was my only answer.

"How uncanny!" cried Zanda. "Why don't they answer us? There must be someone here; there is someone here. I know it! I cannot see them, but there are people here. They are all around us."

"I am sure that you are right, Zanda," I said. "There must be someone in that castle, and I am going to have a look inside it. Jat Or, you and Zanda wait here."

"I think we should all go together," said the girl.

"Yes," agreed Jat Or; "we must not separate."

I saw no valid objection to the plan, and so I nodded my acquiescence; then I approached a closed door in the face of the castle wall. Behind me came Jat Or and Zanda.

We had crossed about half the distance from the ship to the door, when at last suddenly, startlingly, the silence was shattered by a voice, terror-ridden, coming from above, apparently from one of the lofty towers overlooking the courtyard.

"Escape, my chieftain!" it cried. "Escape from this horrible place while you may."

I halted, momentarily stunned—it was the voice of Dejah Thoris.

"The princess!" exclaimed Jat Or.

"Yes," I said, "the princess. Come!" Then I started on a run toward the door of the castle; but I had taken scarce a half dozen steps, when just behind me Zanda voiced a piercing scream of terror.