Rigidly attached to and projecting from each side of the upper rim of the belt is a strong, light wing with small hand levers for quickly altering its position.

Gor Hajus quickly explained the method of control, but I could apprehend that there might be embarrassment and trouble awaiting me before I mastered the art of flying in an equilibrimotor. He showed me how to tilt the wings downward in walking so that I would not leave the ground at every step, and thus he led me to the edge of the landing stage.

"We will rise here," he said, "and keeping in the darkness of the upper levels seek to reach the house of my friend without being detected. If we are pursued by air patrols we must separate; and later those who escape may gather just west of the city wall where you will find a small lake with a deserted tower upon its northern rim-this tower will be our rendezvous in event of trouble. Follow me!" He started his motor and rose gracefully into the air.

Hovan Du followed him and then it was my turn. I rose beautifully for about twenty feet, floating out over the city which lay hundreds of feet below, and then, quite suddenly, I turned upside down. I had done something wrong-I was quite positive of it. It was a most startling sensation, I can assure you, floating there with my head down, quite helpless; while below me lay the streets of a great city and no softer, I was sure, than the streets of Los Angeles or Paris. My motor was still going, and as I manipulated the controls which operated the wings I commenced to describe all sorts of strange loops and spirals and spins; and then Dar Tarus came to my rescue. First he told me to lie quietly and then directed the manipulation of each wing until I had gained an upright position. After that I did fairly well and was soon rising in the wake of Gor Hajus and Hovan Du.

I need not describe in detail the hour of flying, or rather floating, that ensued. Gor Hajus led us to a considerable altitude and there, through the darkness above the city, our slow motors drove us towards a district of magnificent homes surrounded by spacious grounds; and here, as we hovered over a large palace, we were suddenly startled by a sharp challenge coming from directly above us.

"Who flies by night?" a voice demanded.

"Friends of Mu Tel, Prince of the House of Kan," replied Gor Hajus: quickly.

"Let me see your night flying permit and your flier's licence," ordered the one above us, at the same time swooping suddenly to our level and giving me my first sight of a Martian policeman. He was equipped with a much swifter and handier equilibrimotor than ours. I think that was the first fact to impress us deeply, and it demonstrated the futility of flight; for he could have given us ten minutes’ start and overhauled each of us within another ten minutes, even though we had elected to fly in different directions. The fellow was a warrior rather than a policeman, though detailed to duty such as our Earthly police officers perform; the city being patrolled both day and night by the warriors of Vobis Kan's army.

He dropped now close to the assassin of Toonol, again demanding permit and licence and at the same time flashing a light in the face of my comrade.

"By the sword of the Jeddak!" he cried. "Fortune heaps her favors upon me. Who would have thought an hour since that it would be I who would collect the reward for the capture of Gor Hajus?"

"Any other fool might have thought it," returned Gor Hajus, "but he would have been as wrong as you," and as he spoke he struck with the short-sword I had loaned him.

The blow was broken by the wing of the warrior's equilibrimotor, which it demolished, yet it inflicted a severe wound in the fellow's shoulder. He tried to back off, but the damaged wing caused him only to wheel around erratically; and then he seized upon his whistle and attempted to blow a mighty blast that was cut short by another blow from Gor Hajus' sword that split the man's head open to the bridge of his nose.

"Quick!" cried the assassin. "We must drop into the gardens of Mu Tel, for that signal will bring a swarm of air patrols about our heads."

The others I saw falling rapidly towards the ground, but again I had trouble.

Depress my wings as I would I moved only slightly downward and upon a path that, if continued, would have landed me at a considerable distance from the gardens of Mu Tel. I was approaching one of the elevated portions of the palace, what appeared to be a small suite that was raised upon its shining metal shaft far above the ground. From all directions I could hear the screaming whistles of the air patrols answering the last call of their comrade whose corpse floated just above me, a guide even in death to point the way for his fellows to search us out. They were sure to discover him and then I would be in plain view, of them and my fate sealed.

Perhaps I could find ingress to the apartment looming darkly near! There I might hide until the danger had passed, provided I could enter, undetected. I directed my course towards the structure; an open window took form through the darkness and then I collided with a fine wire netting-I had run into a protecting curtain that fends off assassins of the air from these high-flung sleeping apartments. I felt that I was lost. If I could but reach the ground I might find concealment among the trees and shrubbery that I had seen vaguely outlined beneath me in the gardens of this Barsoomian prince; but I could not drop at a sufficient angle to bring me to ground within the garden, and when I tried to spiral down I turned over and started up again. I thought of ripping open my belt and letting the eighth ray escape; but in my unfamiliarity with this strange force I feared that such an act might precipitate me to the ground with too great violence, though I was determined to have recourse to it as a last alternative if nothing less drastic presented itself.

In my last attempt to spiral downward I rose rapidly feet foremost to a sudden and surprising collision with some object above me. As I frantically righted myself, fully expecting to be immediately seized by a member of the air patrol, I found myself face to face with the corpse of the warrior Gor Hajus had slain.

The whistling of the air patrols sounded ever nearer-it could be only a question of seconds now before I was discovered-and with the stern necessity that confronted me, with death looking me in the face, there burst upon me a possible avenue of escape from my dilemma.

Seizing tightly with my left hand the harness of the dead Toonolian, I whipped out my dagger and slashed his buoyancy belt a dozen times. Instantly, as the rays escaped, his body started to drag me downward, Our descent was rapid, but not precipitate, and it was but a matter of seconds before we landed gently upon the scarlet sward of the gardens of Mu Tel, Prince of the House of Kan, close beside a clump of heavy shrubbery. Above me sounded the whistles of the circling patrols as I dragged the corpse of the warrior into the concealing depth of the foliage. Nor was I an instant too soon for safety, as almost immediately the brilliant rays of a searchlight shot downward from the deck of a small patrol ship, illuminating the open spaces of the garden all about me. A hurried glance through the branches and the leaves of my sanctuary revealed nothing of my companions and I breathed a sigh of relief in the thought that they, too, had found concealment.

The light played for a short time about the gardens and then passed on, as did the sound of the patrol's whistles, as the search proceeded elsewhere; thus giving me the assurance that no suspicion was directed upon our hiding place.

Left in darkness I appropriated such of the weapons of the dead warrior as I coveted, after having removed my equilibrimotor, which I was first minded to destroy, but which I finally decided to moor to one of the larger shrubs against the possibility that I might again have need for it; and now, secure in the conviction that the danger of discovery by the air patrol had passed, I left my concealment and started in search of my companions.