The hangar guard may have thought that it was an unusual time of night for me to be going abroad, but he could have had no suspicion as to my destination. I took off toward the west and presently was cutting the thin air of Mars beneath the myriad stars and the two gorgeous satellites of the red planet.

The moons of Mars have always intrigued me; and tonight, as I gazed upon them, I felt the lure of the mystery that surrounds them. Thuria, the nearer moon, known to earth men as Phobos, is the larger; and as it circles Barsoom at a distance of only 5800 miles, it presents a most gorgeous sight. Cluros, the farther moon, though only a little smaller in diameter than Thuria, appears to be much smaller because of the greater distance of its orbit from the planet, lying as it does, 14,500 miles away.

For ages, there was a Martian legend, which remained for me to explode, that the black race, the so-called First-born of Barsoom, lived upon Thuria, the nearer moon; but at the time I exposed the false gods of Mars, I demonstrated conclusively that the black race lived in the Valley Dor, near the south pole of the planet.

Thuria, seemingly hanging low above me, presented a gorgeous spectacle, which was rendered still more remarkable by the fact that she apparently moved through the heavens from west to east, due to the fact that her orbit is so near the planet she performs a revolution in less than one-third of that of the diurnal rotation of Mars. But as I watched her this night in dreamy fascination, little could I guess the part that she was so soon to play in the thrilling adventures and the great tragedy that lay just beyond my horizon.

When I was well beyond the Twin Cities of Helium, I cut off my running lights and circled to the south, gradually heading toward the east until I held a true course for Zodanga. Setting my destination compass, I was free to turn my attention to other matters, knowing that this clever invention would carry the ship safely to its destination.

My first task was to repaint the hull of the flier. I buckled straps onto my harness and onto rings in the gunwale of the craft; and then, lowering myself over the side, I proceeded to my work. It was slow work, for after painting as far as I could reach in all directions, I had to come on deck and change the position of the straps, so that I could cover another portion of the hull. But toward morning it was finally accomplished, though I cannot say that I looked with pride upon the result as anything of an artistic achievement. However, I had succeeded in covering the old paint and thus disguising the craft insofar as color was concerned. This accomplished, I threw my brush and the balance of the paint overboard, following them with the leather harness that I had worn from home.

As I had gotten almost as much paint upon myself as upon the hull of the boat, it took me some little time to erase the last vestige of this evidence that would acquaint a discerning observer with the fact that I had recently repainted my craft.

This done, I applied the red pigment evenly to every square inch of my naked body; so that after I had finished, I could have passed anywhere on Mars as a member of the dominant red race of Martians; and when I had donned the Zodangan harness, metal, and weapons, I felt that my disguise was complete.

It was now mid-forenoon; and, after eating, I lay down to snatch a few hours of sleep.

Entering a Martian city after dark is likely to be fraught with embarrassment for one whose mission may not be readily explained. It was, of course, possible that I might sneak in without lights; but the chances of detection by one of the numerous patrol boats was too great; and as I could not safely have explained my mission or revealed my identity, I should most certainly be sent to the pits and, doubtless, receive the punishment that is meted to spies-long imprisonment in the pits, followed by death in the arena.

Were I to enter with lights, I should most certainly be apprehended; and as I should not be able to answer questions satisfactorily, and as there would be no one to sponsor me, my predicament would be almost equally difficult; so as I approached the city before dawn of the second day, I cut out my motor and drifted idly well out of range of the searchlights of the patrol boats.

Even after daylight had come, I did not approach the city until the middle of the forenoon at a time when other ships were moving freely back and forth across the walls.

By day, and unless a city is actively at war, there are few restrictions placed upon the coming and going of small craft. Occasionally the patrol boats stop and question one of these; and as fines are heavy for operating without licenses, a semblance of regulation is maintained by the government.

In my case, it was not a question of a license to fly a ship but of my right to be in Zodanga at all; so my approach to the city was not without its spice of adventure.

At last the city wall lay almost directly beneath me; and I was congratulating myself upon my good fortune, as there was no patrol boat in sight; but I had congratulated myself too soon, for almost immediately there appeared from behind a lofty tower one of those swift little cruisers that are commonly used in all Martian cities for patrol service, and it was headed directly toward me.

I was moving slowly, so as not to attract unfavorable attention; but I can assure you that my mind was working rapidly. The one-man scout flier that I was using is very fast, and I might easily have turned and outdistanced the patrol boat; however, there were two very important objections to such a plan. One was that, unquestionably, the patrol boat would immediately open fire on me with the chances excellent that they would bring me down. The other was, that should I escape, it would be practically impossible for me to enter the city again in this way, as my boat would be marked; and the entire patrol system would be on the lookout for it.

The cruiser was steadily approaching me, and I was preparing to bluff my way through with a cock-and-bull story of having been long absent from Zodanga and having lost my papers while I was away. The best that I could hope from this was that I should merely be fined for not having my papers, and as I was well supplied with money, such a solution of my difficulties would be a most welcome one.

This, however, was a very slim hope, as it was almost a foregone conclusion that they would insist upon knowing who my sponsor was at the time my lost papers were issued; and without a sponsor I would be in a bad way.

Just as they got within hailing distance, and I was sure that they were about to order me to stop, I heard a loud crash above me; and glancing up, I saw two small ships in collision. I could see the officer in command of the patrol boat plainly now; and as I glanced at him, I saw him looking up. He barked a short command; the nose of the patrol boat was elevated; and it circled rapidly upward, its attention diverted from me by a matter of vastly greater importance.

While it was thus engaged, I slipped quietly on into the city of Zodanga.

At the time, many years ago, that Zodanga was looted by the green hordes of Thark, it had been almost completely razed. It was the old city with which I had been most familiar, and I had visited the rebuilt Zodanga upon but one or two occasions since.

Cruising idly about, I finally found that for which I sought-an unpretentious public hangar in a shabby quarter of the city. There are quarters in every city with which I am familiar where one may go without being subjected to curious questioning, so long as one does not run afoul of the officers of the law. This hangar and this quarter of Zodanga looked such a place to me.

The hangar was located on the roof of a very old building that had evidently escaped the ravages of the Tharks. The landing space was small, and the hangars themselves dingy and unkempt.