There were balconies before the windows at several levels, and I noticed particularly that there were three of these in front of windows on the upper story. These balconies offered me a means of ingress to the upper floor if I could but reach them.

The great strength and agility which the lesser gravitation of Mars imparts to my earthly muscles might have sufficed to permit me to climb the exterior of the building, except for the fact that this particular building seemed to offer no foothold up to the fifth story, above which its carved ornamentation commenced.

Mentally debating every possibility, by a process of elimination, I was forced to the conclusion that my best approach would be by way of the roof.

However, I determined to investigate the possibilities of the main entrance on the ground floor; and was about to cross the avenue for that purpose when I saw two men approaching. 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.