“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 license 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?”