"Not entirely. I must have a master swordsman. Rapas, here, is handy with the short sword. Let us see what you can do against him."

"To the death?" I asked.

Rapas guffawed loudly. "I did not bring you here to kill you," he said.

"No, not to the death, of course," said Fal Sivas. "Just a short passage. Let us see which one can scratch the other first."

I did not like the idea. I do not ordinarily draw my sword unless I intend to kill, but I realized that I was playing a part and that before I got through I might have to do many things of which I did not approve; so I nodded my assent and waited for Rapas to draw.

His short sword flashed from its scabbard. "I shall not hurt you badly, Vandor," he said; "for I am very fond of you."

I thanked him and drew my own weapon.

Rapas stepped forward to engage me, a confident smile upon his lips. The next instant his weapon was flying across the room. I had disarmed him, and he was at my mercy. He backed away, a sickly grin upon his face. Fal Sivas laughed.

"It was an accident," said Rapas. "I was not ready."

"I am sorry," I told him; "go and recover your weapon."

He got it and came back, and this time he lunged at me viciously. There would have been no mere scratch that time if his thrust had succeeded. He would have spitted me straight through the heart. I parried and stepped in, and again his sword hurtled through the air and clanked against the opposite wall.

Fal Sivas laughed uproariously. Rapas was furious. "That is enough," said the former. "I am satisfied. Sheath your swords."

I knew that I had made an enemy of Rapas; but that did not concern me greatly, since being forewarned I could always be watchful of him. Anyway, I had never trusted him.

"You are prepared to enter my service at once?" asked Fal Sivas.

"I am in your service now," I replied.

He smiled. "I think you are going to make me a good man. Rapas wants to go away for a while to attend to business of his own. While he is away, you will remain here as my bodyguard. When he returns, I may still find use for you in one way or another. The fact that you are unknown in Zodanga may make you very valuable to me." He turned to Rapas. "You may go now, Rapas," he said, "and while you are away, you might take some lessons in swordsmanship."

When Fal Sivas said that, he grinned; but Rapas did not. He looked very sour, and he did not say good-bye to me as he left the room.

"I am afraid that you offended his dignity," said Fal Sivas after the door had closed behind the assassin.

"I shall lose no sleep over it," I replied, "and anyway it was not my fault. It was his."

"What do you mean?" demanded Fal Sivas.

"Rapas is not a good swordsman."

"He is considered an excellent one," Fal Sivas assured me.

"I imagine that as a killer he is more adept with the dagger and poison."

"And how about you?" he asked.

"Naturally, as a fighting man, I prefer the sword," I replied.

Fal Sivas shrugged. "That is a matter of small concern to me," he said. "If you prefer to kill my enemies with a sword, use a sword. All I ask is that you kill them."

"You have many enemies?" I asked.

"There are many who would like to see me put out of the way," he replied. "I am an inventor, and there are those who would steal my inventions. Many of these I have had to destroy. Their people suspect me and seek revenge; but there is one who, above all others, seeks to destroy me. He also is an inventor, and he has employed an agent of the assassins' guild to make away with me.

"This guild is headed by Ur Jan, and he personally has threatened my life because I have employed another than a member of his guild to do my killing."

We talked for a short time, and then Fal Sivas summoned a slave to show me to my quarters. "They are below mine," he said; "if I call, you are to come to me immediately. Good night."

The slave led me to another room on the same level. In fact, to a little suite of three rooms. They were plainly but comfortably furnished.

"Is there anything that you require, master?" the slave inquired, as he turned to leave me.

"Nothing," I replied.

"Tomorrow a slave will be assigned to serve you." With that he left me, and I listened to see if he locked the door from the outside; but he did not, though I would not have been surprised had he done so, so sinister and secretive seemed everything connected with this gloomy pile.

I occupied myself for a few moments inspecting my quarters. They consisted of a living room, two small bedrooms, and a bath. A single door opened from the living room onto the corridor. There were no windows in any of the rooms. There were small ventilators in the floors and in the ceilings, and draughts of air entering the former indicated that the apartment was ventilated mechanically.

The rooms were lighted by radium bulbs similar to those generally used throughout Barsoom.

In the living room was a table, a bench, and several chairs, and a shelf upon which were a number of books. Glancing at some of these, I discovered that they were all scientific works. There were books on medicine, on surgery, chemistry, mechanics, and electricity.

From time to time, I heard what appeared to be stealthy noises in the corridor; but I did not investigate, as I wanted to establish myself in the confidence of Fal Sivas and his people before I ventured to take it upon myself to learn any more than they desired me to know. I did not even know that I wanted to know anything more about the household of Fal Sivas; for, after all, my business in Zodanga had nothing to do with him. I had come to undermine and, if possible, overthrow the strength of Ur Jan and his guild of assassins; and all I needed was a base from which to work. I was, in fact, a little disappointed to find that Fate had thrown me in with those opposed to Ur Jan. I would have preferred and, in fact, had hoped to be able to join Ur Jan's organization, as I felt that I could accomplish much more from the inside than from the out.

If I could join the guild, I could soon learn the identity of its principal members; and that, above all other things, was what I wished to do, that I might either bring them to justice or put the cross upon their hearts with the point of my own sword.

Occupied with these thoughts, I was about to remove my harness and turn into my sleeping silks and furs when I heard sounds of what might have been a scuffle on the level above and then a thud, as of a body falling.

The former preternatural silence of the great house accentuated the significance of the sounds that I was hearing, imparting to them a mystery that I realized might be wholly out of proportion to their true importance. I smiled as I realized the effect that my surroundings seemed to be having upon my ordinarily steady nerves; and had resumed my preparations for the night when a shrill scream rang through the building.

I paused again and listened, and now I distinctly heard the sound of feet running rapidly. They seemed to be approaching, and I guessed that they were coming down the ramp from the level above to the corridor that ran before my quarters.

Perhaps what went on in the house of Fal Sivas was none of my affair, but I have never yet heard a woman scream without investigating; so now I stepped to the door of my living room and threw it open, and as I did so I saw a girl running rapidly toward me. Her hair was disheveled; and from her wide, frightened eyes she cast frequent glances backward over her shoulder.

She was almost upon me before she discovered me; and when she did she paused for a moment with a gasp of astonishment or fear, I could not tell which; then she darted past me through the open door into my living room.

"Close the door," she whispered, her voice tense with suppressed emotion. "Don't let him get me! Don't let him find me!"