Stepping back into the shadows of my hiding-place, I waited for them to pass; but instead of doing so they stopped before the entrance to the building I was watching. They were there but a moment when I saw the door open and the men admitted. This incident convinced me that someone was on guard at the main entrance to the building, and that it would be futile for me to attempt to enter there.

There now remained to me only the roof as a means of entrance to the building, and I quickly decided upon a plan to accomplish my design.

Leaving my hiding-place, I quickly retraced my steps to the public house in which I had been lodging, and went immediately to the hangar on the roof.

The place was deserted, and I was soon at the controls of my flier. I had now to run the chance of being stopped by a patrol boat, but this was a more or less remote contingency; as, except in cases of public emergency, little attention is paid to private fliers within the walls of the city.

However, to be on the safe side, I flew low, following dark avenues below the level of the roof tops; and in a short time I reached the vicinity of the building that was my goal.

Here I rose above the level of the roofs and, having located the building, settled gently to its roof.

The building had not been intended for this purpose, and there was neither hangar nor mooring rings; but there are seldom high winds on Mars, and this was a particularly quiet and windless night.

Leaving the deck of the flier, I searched the roof for some means of ingress to the building. I found a single small scuttle, but it was strongly secured from within, and I could not budge it—at least without making far too much noise.

Going to the edge of the building, overlooking the avenue, I looked down upon one of the balconies directly below me. I could have lowered myself from the eaves and, hanging by my hands, dropped directly onto it; but here again I faced the danger of attracting attention by the noise that I must make in alighting.

I examined the face of the building just below me and discovered that, in common with most Martian buildings, the carved ornamentation offered handholds and footholds sufficient to my need.

Slipping quietly over the eaves, I felt around with my toes until I found a projection that would support me. Then, releasing one hand, I felt for a new hold; and so, very slowly and carefully, I descended to the balcony.

I had selected the place of my descent so that I was opposite an unlighted window. For a moment I stood there listening. Somewhere within the interior of the building I heard subdued voices. Then I threw a leg over the sill and entered the darkness of the apartment beyond.

Slowly I groped my way to a wall and then followed along it until I came to a door at the end of the room opposite the window. Stealthily I felt for the latch and lifted it. I pulled gently; the door was not locked; it swung in toward me without noise.

Beyond the door was a corridor. It was very faintly illuminated, as though by reflected light from an open doorway or from another corridor. Now the sound of voices was more distinct. Silently I crept in the direction from which they came.

Presently I came to another corridor running at right angles to the one I was following. The light was stronger here, and I saw that it came from an open doorway farther along the corridor which I was about to enter. I was sure, however, that the voices did not come from this room that I could see, as they would have been far more clear and distinct had they.

My position was a precarious one. I knew nothing at all about the interior arrangements of the building. I did not know along which corridor its inmates came and went. If I were to approach the open doorway, I might place myself in a position where discovery would be certain.

I knew that I was dealing with killers, expert swordsmen all; and I did not try to deceive myself into believing that I would be any match for a dozen or more of them.

However, men who live by the sword are not unaccustomed to taking chances, sometimes far more desperate chances than their mission may seem to warrant.

Perhaps such was the case now, but I had come to Zodanga to learn what I could about the guild of assassins headed by the notorious Ur Jan; and now that fortune had placed me in a position where I might gain a great deal of useful information, I had no thought of retreating because a little danger confronted me.

Stealthily I crept forward, and at last I reached the door. Very cautiously I surveyed the interior of the room beyond, as I moved, inch by inch, across the doorway.

It was a small room, evidently an ante-room; and it was untenanted. There was some furniture in it—a table, some benches; and I noticed particularly an old-fashioned cupboard that stood diagonally across one corner of the room, one of its sides about a foot from the wall.

From where I stood in the doorway, I could now hear the voices quite distinctly; and I was confident that the men I sought were in the adjoining room just beyond.

I crept into the ante-room and approached the door at the opposite end. Just to the left of the door was the cupboard that I have mentioned.

I placed my ear close to the panels of the door in an effort to overhear what was being said in the room beyond, but the words came to me indistinct and muffled. This would never do. I could neither see nor hear anything under these conditions.

I decided that I must find some other point of approach and was turning to leave the room when I heard footsteps approaching along the corridor. I was trapped!

chapter IV

DEATH BY NIGHT

ON MORE THAN ONE occasion in my life have I been in tight places, but it seemed to me at the time that I had seldom before blundered into such a trap. The footsteps were approaching rapidly along the corridor. I could tell by their sound that they were made by more than one person.

If there were only two men, I might fight my way past them; but the noise of the encounter would attract those in the room behind me, and certainly any sort of a fight whatever would delay me long enough so that those who were attracted by it would be upon me before I could escape.

Escape! How could I escape if I were detected? Even if I could reach the balcony, they would be directly behind me; and I could not climb out of reach toward the roof before they could drag me down.

My position seemed rather hopeless, and then my eye fell upon the cupboard standing in the corner just beside me and the little foot-wide crack between it and the wall.

The footsteps were almost opposite the doorway. There was no time to be lost. Quickly I slipped behind the cupboard and waited.

Nor was I a moment too soon.