As my eyes returned to the island at our feet I saw a huge form emerge from one of the nearby patches of jungle a short distance beyond the outer wall. It was followed by a second and a third. Ras Thavas saw that the creatures had attracted my notice.
"There," he said, pointing to them, "are three of a number of similar reasons why it would not have been safe for us to venture outside the enclosure."
They were great white apes of Barsoom, creatures so savage that even that fierce Barsoomian lion, the banth, hesitates to cross their path.
"They serve two purposes," explained Ras Thavas. "They discourage those who might otherwise creep upon me by night from the city of Toonol, where I am not without many good enemies, and they prevent desertion upon the part of my slaves and assistants."
"But how do your clients reach you?" I asked. "How are your supplies brought in?"
He tuned and pointed down toward the highest portion of the irregular roof of the building below us. Built upon it was a large, shed-like structure. "There," he said, "I keep three small ships. One of them goes every day to Toonol."
I was overcome with eagerness to know more about these ships, in which I thought I saw a much needed means of escape from the island; but I dared not question him for fear of arousing his suspicions.
As we turned to descend the tower runway I expressed interest in the structure which gave evidence of being far older than any of the surrounding buildings.
"This tower," said Ras Thavas, "was built some twenty-three thousand years ago by an ancestor of mine who was driven from Toonol by the reigning Jeddak of the time. Here, and upon other islands, he gathered a considerable following, dominated the surrounding marshes and defended himself successfully for hundreds of years. While my family has been permitted to return to Toonol since, this has been their home; to which, one by one, have been added the various buildings which you see about the tower, each floor of which connects with the adjacent building from the roof to the lowest pits beneath the ground."
This information also interested me greatly since I thought that I saw where it too might have considerable bearing upon my plan of escape, and so, as we descended the runway, I encouraged Ras Thavas to discourse upon the construction of the tower, its relation to the other buildings and especially its accessibility from the pits. We walked again in the outer garden and by the time we returned to Ras Thavas' quarters it was almost dark and the master surgeon was considerably fatigued.
"I feel that I shall sleep well to-night," he said as I left him.
"I hope so, Ras Thavas," I replied.
ESCAPE
It was usually about three hours after the evening meal, which was served immediately after dark, that the establishment quieted down definitely for the night. While I should have preferred waiting longer before undertaking that which I had in mind, I could not safely do so, since there was much to be accomplished before dawn. So it was that with the first indications that the occupants of the building in which my work was to be performed had retired for the night, I left my quarters and went directly to the laboratory, where, fortunately for my plans, the bodies of Gor Hajus, the assassin of Toonol, and 378-J-493811-P both reposed. It was the work of a few minutes to carry them to adjoining tables, where I quickly strapped them securely against the possibility that one or both of them might not be willing to agree to the proposition I was about to make them, and thus force me to anaesthetize them again. At last the incisions were made, the tubes attached and the motors started. 378-J-493811-P, whom I shall hereafter call by his own name, Dar Tarus, was the first to open his eyes; but he had not regained full consciousness when Gor Hajus showed signs of life.
I waited until both appeared quite restored. Dar Tarus was eyeing me with growing recognition that brought a most venomous expression of hatred to his countenance. Gor Hajus was frankly puzzled. The last he remembered was the scene in the death chamber at the instant that his executioner had run a sword through his heart. It was I who broke the silence.
"In the first place" I said, "let me tell you where you are, if you do not already know."
"I know well enough where I am," growled Dar Tarus.
"Ah!" exclaimed Gor Hajus, whose eyes had been roaming about the chamber. "I can guess where I am. What Toonolian has not heard of Ras Thavas? So they sold my corpse to the old butcher did they? And what now? Did I just arrive?"
"You have been here six years," I told him, "and you may stay here for ever unless we three can reach an agreement within the next few minutes, and that goes for you too, Dar Tarus."
"Six years!" mused Gor Hajus. "Well, out with it, man. What do you want? If it is to slay Ras Thavas, no! He has saved me from utter destruction; but name me some other, preferably Vobis Kan, Jeddak of Toonol. Find me a blade and I will slay a hundred to regain life."
"I seek the life of none unless he stands in the way of the fulfilment of my desire in this matter that I have in hand. Listen! Ras Thavas had here a beautiful Duhorian girl. He sold her body to Xaxa, Jeddara of Phundahl, transplanting the girl's brain to the wrinkled and hideous body of the Jeddara. It is my intention to regain the body, restore it to its own brain and return the girl to Duhor."
Gor Hajus grinned. "You have a large contract on your hands," he said, "but I can see that you are a man after my own heart and I am with you. It will give freedom and fighting, and all that I ask is a chance for one thrust at Vobis Kan."
"I promise you life," I replied; "but with the understanding that you serve me faithfully and none other, undertaking no business of your own, until mine has been carried to a successful conclusion."
"That means that I shall have to serve you for life," he replied, "for the thing you have undertaken you can never accomplish; but that is better than lying here on a cold ersite slab waiting for old Ras Thavas to come along and carve out my gizzard. I am yours! Let me up, that I may feel a good pair of legs under me again."
"And you?" I asked, turning to Dar Tarus as I released the bonds that held Gor Hajus. For the first time I now noticed that the ugly expression that I had first noted upon the face of Dar Tarus had given place to one of eagerness.
"Strike off my bonds!" he cried. "I will follow you to the ends of Barsoom and the way leads thus far to the fulfilment of your design; but it will not. It will lead to Phundahl and to the chamber of the wicked Xaxa, where, by the generosity of my ancestors, I may be given the opportunity to avenge the hideous wrong the creature did me. You could not have chosen one better fitted for your mission than Dar Tarus, one time soldier of the Jeddara's Guard, whom she had slain that in my former body one of her rotten nobles might woo the girl I loved."
A moment later the two men stood at my side, and without more delay I led them towards the runway that descended to the path beneath the building. As we went, I described to them the creature I had chosen to be the fourth member of our strange party. Gor Hajus questioned the wisdom of my choice, saying that the ape would attract too much attention to us. Dar Tarus, however, believed that it might be helpful in many respects, since it was possible that we might be compelled to spend some time among the islands of the marshes which were often infested with these creatures; while, once in Phundahl, the ape might readily be used in the furtherance of our plans and would cause no considerable comment in a city where many of these beasts are held in captivity and often are seen performing for the edification of street crowds.