"And you did not advise Ras Thavas?" I asked.

"I advised no one," he replied. "Years ago I learned to mind my own business, to see all, to hear all and to tell nothing unless it profited me to do so."

"But you said that the reward is high for our apprehension," Gor Hajus reminded him. "Would it not be profitable to collect it?"

"There are in the breasts of honourable men," replied Bal Zak, "forces that rise superior to the lust for gold, and while Toonolians are supposedly a people free from the withering influences of sentiment yet I for one am not totally unconscious of the demand of gratitude. Six years ago, Gor Hajus, you refused to assassinate my father, holding that he was a good man, worthy to live and one that had once befriended you slightly. To-day, through his son, you reap your reward and in some measure are repaid for the punishment that was meted out to you by Vobis Kan because of your refusal to slay the sire of Bal Zak. I have sent my crew away that none aboard the Vosar but myself might have knowledge of your presence. Tell me your plans and command me in what way I may be of further service to you."

"We wish to reach the streets, unobserved," replied Gor Hajus. "Can you but help us in that we shall not put upon your shoulders further responsibility for our escape. You have our gratitude and in Toonol, I need not remind you, the gratitude of Gor Hajus is a possession that even the Jeddak has craved."

"Your problem is complicated," said Bal Zak, after a moment of thought, "by the personnel of your party. The ape would immediately attract attention and arouse suspicion. Knowing much of Ras Thavas' experiments I realized at once this morning, after watching him with you, that he had the brain of a man; but this very fact would attract to him and to you the closer attention of the masses."

"I do not need acquaint them with the fact," growled Hovan Du. "To them I need be but a captive ape. Are such unknown in Toonol?"

"Not entirely, though they are rare," replied Bal Zak. "But there is also the white skin of Vad Varo! Ras Thavas appears to have known nothing of the presence of the ape with you; but he full well knew of Vad Varo, and your description has been spread by every means at his command. You would be recognized immediately by the first Toonolian that lays eyes upon you, and then there is Gor Hajus. He has been as dead for six years, yet I venture there is scarce a Toonolian that broke the shell prior to ten years ago who does not know the face of Gor Hajus as well as he knows that of his own mother. The Jeddak himself was not better known to the people of Toonol than Gor Hajus. That leaves but one who might possibly escape suspicion and detection in the streets of Toonol."

"If we could but obtain weapons for these others," I suggested, "we might even yet reach the house of Gor Hajus' friend."

"Fight your way through the city of Toonol?" demanded Bal Zak.

"If there is no other way we should have to," I replied.

"I admire the will," commented the commander of the Vosar, "but fear that the flesh is without sufficient strength. Wait! there is a way- perhaps. On the stage just below this there is a public depot where equilibrimotors are kept and rented. Could we find the means to obtain four of these there would be a chance, at least, for you to elude the air patrols and reach the house of Gor Hajus' friend; and I think I see a way to the accomplishment of that. The landing tower is closed for the night but there are several watchmen distributed through it at different levels. There is one at the equilibrimotor depot and, as I happen to know, he is a devotee of jetan. He would rather play jetan than attend to his duties as watchman. I often remain aboard the Vosar at night and occasionally he and I indulge in a game. I will ask him up to-night and while he is thus engaged you may go to the depot, help yourselves to equilibrimotors and pray to your ancestors that no air patrol suspects you as you cross the city towards your destination. What think you of this plan, Gor Hajus?"

"It is splendid," replied the assassin. "And you, Vad Varo?"

"If I knew what an equilibrimotor is I might be in a better position to judge the merits of the plan," I replied. "However, I am satisfied to abide by the judgment of Gor Hajus. I can assure you, Bal Zak, of our great appreciation, and as Gor Hajus has put the stamp of his approval upon your plan I can only urge you to arrange that we may put it into effect with as little delay as possible."

"Good!" exclaimed Bal Zak. "Come with me and I will conceal you until I have lured the watchman to the jetan game within my cabin. After that your fate will be in your own hands."

We followed him from the ship on to the deck of the landing stage and close under the side of the Vosar opposite that from which the watchman must approach the ship and enter it. Then, bidding us good luck, Bal Zak departed.

From the summit of the landing tower I had my first view of a Martian city.

Several hundred feet below me lay spread the broad, well-lighted avenues of Toonol, many of which were crowded with people. Here and there, in this central district, a building was raised high upon its supporting, cylindrical metal shaft; while further out, where the residences predominated, the city took on the appearance of a colossal and grotesque forest. Among the larger palaces only an occasional suite of rooms was thus raised high above the level of the others, these being the sleeping apartments of the owners, their servants or their guests; but the smaller homes were raised in their entirety, a precaution necessitated by the constant activities of the followers of Gor Hajus' ancient profession that permitted no man to be free from the constant menace of assassination. Throughout the central district the sky was pierced by the lofty towers of several other landing stages; but, as I was later to learn, these were comparatively few in number. Toonol is in no sense a flying nation, supporting no such enormous fleets of merchant ships and vessels of war as, for example, the twin cities of Helium or the great capital of Ptarth.

A peculiar feature of the street lighting of Toonol, and in fact the same condition applies to the lighting of other Barsoomian cities I have visited, I noted for the first time that night as I waited upon the landing stage for the return of Bal Zak with the watchman. The luminosity below me seemed confined directly to the area to be lighted; there was no diffusion of light upward or beyond the limits the lamps were designed to light This was effected, I was told, by lamps designed upon principles resulting from ages of investigation of the properties of light waves and the laws governing them which permit Barsoomian scientists to confine and control light as we confine and control matter. The light waves leave the lamp, pass along a prescribed circuit and return to the lamp. There is no waste nor, strange this seemed to me, are there any dense shadows when lights are properly installed and adjusted, for the waves in passing around objects to return to the lamp, illuminate all sides of them.

The effect of this lighting from the great height of the tower was rather remarkable. The night was dark, there being no moons at that hour upon this night, and the effect was that obtained when sitting in a darkened auditorium and looking upon a brilliantly lighted stage. I was still intent upon watching the life and colour beneath when we heard Bal Zak returning. That he had been successful in his mission was apparent from the fact that he was conversing with another.

Five minutes later we crept quietly from our hiding place and descended to the stage below where lay the equilibrimotor depot. As theft is practically unknown upon Barsoom, except for purposes entirely disassociated from a desire to obtain pecuniary profit through the thing stolen, no precautions are taken against theft. We therefore found the doors of the depot open and Gor Hajus and Dar Tarus quickly selected four equilibrimotors and adjusted them upon us. They consist of a broad belt, not unlike the life belt used aboard trans-oceanic liners upon Earth; these belts are filled with the eighth Barsoomian ray, or ray of propulsion, to a sufficient degree to just about equalize the pull of gravity and thus to maintain a person in equilibrium between that force and the opposite force exerted by the eighth ray. Permanently attached to the back of the belt is a small radium motor, the controls for which are upon the front of the belt.