most of the other Zarovian nations."
Together the men walked to the ravine where the airship was concealed. Grandon beheld what looked like a small metal duck-boat with a curved glass dome over the tiny cockpit. The airship was about ten feet long and three wide, and without planes, wings, propeller, or rudder.
Vangal noted the look of surprise on the face of his companion.
"You seem puzzled," he said, smiling slightly. "It will do no harm for me to explain something of this craft's general principles, so long as I do not betray the actual secret of motive power.
"Immediately in front of the glass dome you will notice a small, round bulge in the deck. Under that bulge is a delicate mechanism which it is impossible to remove or take apart without breaking a small vial of acid that will instantly destroy it. This mechanism is the motive power of the craft, so you can readily see that it would be quite impossible for an enemy to learn our secret by capturing one of our ships.
"You have heard of telekinesis—the power with which your terrestrial mediums sometimes cause tables and other ponderable objects to rise and hang suspended, or move about in the air without physical aid. My people have been familiar with this wonderful power of the mind for many centuries; this mechanism responds to, and amplifies telekinesis to a remarkable degree. By mind power I am able to cause the craft to rise and hang suspended at almost any altitude, or to move in any direction, backward, forward, or sidewise. For emergency use, in the event of the failure of the motive power, there are two parachutes, one under the small round lid at either end of the craft. By pressing a button I cause the lids to fly back and the parachutes to project from the holes and open almost instantly."
"A most astounding and wonderful invention," exclaimed Grandon.
"Perhaps some day you will visit Olba, and when you do, Vorn Vangal will see that you are provided with a suitable craft as long as you stay in the country—for none but a government official or employee may take one of these airships over the border. It is growing late, and I must begin my journey," Vangal continued, opening the door in the rear of the dome and stepping inside. "Farewell, my friend. I admonish you to hurry hone at once. I see you have not brought your tork or scarbo with you. That is unwise. From now on, never travel without them. On Zarovia you are in constant danger from attack by man or beast. Farewell, and may you soon be firmly seated on the throne of Uxpo."
Grandon warmly clasped the hand of his departing friend, and a feeling of indefinable sadness came over him as he watched the tiny craft rise noiselessly and smoothly to a height of perhaps a thousand feet, then dart away, to be lost to view in a few seconds.
As he stood looking in the direction Vangal had taken, he was startled by the sound of a stealthy footfall behind him. He wheeled, but his eyes could not penetrate the shadows, for night had come on with its characteristic suddenness. At the sound of a second footfall he turned and dashed off through the forest, only to find himself amid a group of warriors with leveled torks.
CHAPTER V
DESPITE THE FACT that the audience chamber of the imperial palace of Reabon was crowded with people, the silence was intense for the scarlet curtains which surrounded the massive throne had been drawn back, signifying the approach of the Torrogina.
Those who stood at the lower end of the hall and farthest from the throne were the slaves, the prevailing color of whose garments was gray. Next to the slaves stood the common people—tradesmen, farmers, merchants, mechanics, and the like—attired in blue. Then came the nobles and their families, who might be recognized anywhere by their purple garments; and finally members of the royal families of Reabon and her many rogats, who were