Altogether we were most uncomfortable; but the distance to Toonol is not so great but that we might hope that our situation would soon be changed-at least if Toonol was to be the destination of the ship. Of this we soon had cheering hope. We had been out but a short time when, faintly, we heard a hail and then the motors were immediately shut down and the ship stopped.

"What ship?" we heard a voice demand, and from aboard our own came the reply: "The Vosar, Tower of Thavas for Toonol." We heard a scraping as the other ship touched ours.

"We are coming aboard to search you in the name of Vobis Kan, Jeddak of Toonol. Make way!" shouted one from the other ship. Our cheer had been of short duration. We heard the shuffling of many feet and Gor Hajus whispered in my ear.

"What shall we do?" he asked.

I slipped my short-sword into his hand. "Fight!" I replied.

"Good, Vad Varo," he replied, and then I handed him my pistol and told him to pass it on to Dar Tarus. We heard the voices again, but nearer now.

"What ho!" cried one. "It is Bal Zak himself, my old friend Bal Zak!" "None other," replied a deep voice. "And whom did you expect to find in command of the Vosar other than Bal Zak?"

"Who could know but that it might have been this Vad Varo himself, or even Gor Hajus," said the other, "and our orders are to search all ships."

"I would that they were here," replied Bal Zak, "for the reward is high. But how could they, when Ras Thavas himself with his own eyes saw them fly off in the Pinsar before dawn this day and disappear in the east?"

"Right you are, Bal Zak," agreed the other, "and it were a waste of time to search your ship. Come men! to our own!" I could feel the muscles about my heart relax with the receding footfalls of Vobis Kan's warriors as they quitted the deck of the Vosar for their own ship, and my spirits rose with the renewed purring of our own motor as Ras Thavas' flier again got under way. Gor Hajus bent his lips close to my ear.

"The spirits of our ancestors smile upon us," he whispered. "It is night and the darkness will aid in covering our escape from the ship and the landing stage."

"What makes you think it is night?" I asked.

"Vobis Kan's ship was close by when it hailed and asked our name. By daylight it could have seen what ship we were."

He was right. We had been locked in that stuffy hole since before dawn, and while I had thought that it had been for a considerable time, I also had realized that the darkness and the inaction and the nervous strain would tend to make it seem much longer than it really had been; so that I would not have been greatly surprised had we made Toonol by daylight.

The distance from the Tower of Thavas to Toonol is inconsiderable, so that shortly after Vobis Kan's ship had spoken to us we came to rest upon the landing stage at our destination. For a long time we waited, listening to the sounds of movement aboard the ship and wondering, upon my part at least, as to what the intentions of the captain might be. It was quite possible that Bal Zak might return to Thavas this same night, especially if he had come to Toonol to fetch a rich or powerful patient to the laboratories; but if he had come only for supplies he might well lie here until the morrow. This much I had learned from Gor Hajus, my own knowledge of the movements of the fliers of Ras Thavas being considerably less than nothing; for, though I had been months a lieutenant of the master surgeon, I had learned only the day before of the existence of his small fleet, it being according to the policy of Ras Thavas to tell me nothing unless the telling of it coincided with and furthered his own plans.

Questions which I asked he always answered, if he reasoned that the effects would not be harmful to his own interests, but he volunteered nothing that he did not particularly wish me to know; and the fact that there were no windows in the outside walls of the building facing towards Toonol, that I had never before the previous day been upon the roof and that I never had seen a ship sail over the inner court towards the east all tended to explain my ignorance of the fleet and its customary operations.

We waited quietly until silence fell upon the ship, betokening either that the crew had retired for the night or that they had gone down into the city. Then, after a whispered consultation with Gor Hajus, we decided to make an attempt to leave the flier. It was our purpose to seek a hiding place within the tower of the landing stage from which we might investigate possible avenues of escape into the city, either at once or upon the morrow when we might more easily mix with the crowd that Gor Hajus said would certainly be in evidence from a few hours after sunrise.

Cautiously I opened the door of our closet and looked into the main cabin beyond. It lay in darkness. Silently we filed out. The silence of the tomb lay upon the flier, but from far below arose the subdued noises of the city. So far, so good! Then, without sound, without warning, a burst of brilliant fight illuminated the interior of the cabin. I felt my fingers tighten upon my sword-hilt as I glanced quickly about.

Directly opposite us, in the narrow doorway of a small cabin, stood a tall man whose handsome harness betokened the fact that he was no common warrior. In either hand he held a heavy Barsoomian pistol, into the muzzles of which we found ourselves staring.

HANDS UP!

In quiet tones he spoke the words of the Barsoomian equivalent of our Earthly hands up! The shadow of a grim smile touched his lips, and as he saw us hesitate to obey his commands he spoke again.

"Do as I tell you and you will be well off. Keep perfect silence. A raised voice may spell your doom; a pistol shot most assuredly."

Gor Hajus raised his hands above his head and we others followed his example.

"I am Bal Zak," announced the stranger. My heart slumped.

"Then you had better commence firing," said Gor Hajus, "for you will not take us alive and we are four to one."

"Not so fast, Gor Hajus," admonished the captain of the Vosar, until you learn what is in my mind."

"That, we already know for we heard you speak of the large reward that awaited the captor of Vad Varo and Gor Hajus," snapped the assassin of Toonol.

"Had I craved that reward so much I could have turned you over to the dwar of Vobis Kan's ship when he boarded us," said Bal Zak.

"You did not know we were aboard the Vosar," I reminded him.

"Ah, but I did."

Gor Hajus snorted his disbelief.

"How then," Bal Zak reminded us, "was I able to be ready upon this very spot when you emerged from your hiding place? Yes, I knew that you were aboard."

"But how?" demanded Dar Tarus.

"It is immaterial," replied Bal Zak, "but to satisfy your natural curiosity I will tell you that I have quarters in a small room in the Tower of Thavas, my windows overlook the roof and the hangar. My long life spent aboard fliers has made me very sensitive to every sound of a ship-motors changing their speed will awaken me in the dead of night, as quickly as will their starting or their stopping. I was awakened by the starting of the motors of the Pinsar; I saw three of you upon the roof and the fourth drop from the deck of the flier as she started and my judgment told me that the ship was being sent out unmanned for some reason of which I had no knowledge. It was too late for me to prevent the act and so I waited in silence to learn what would follow. I saw you hasten into the hangar and I heard Ras Thavas' hail and your reply, and then I saw you board the Vosar. Immediately I descended to the roof and ran noiselessly to the hangar, apprehending that you intended making away with this ship; but there was no one about the controls; and from a tiny port in the control room, through which one has a view of the main cabin, I saw you enter the closet. I was at once convinced that your only purpose was to stow away for Toonol and consequently, aside from keeping an eye upon your hiding place, I went about my business as usual."