His companion was a black man, and I did not need to see his face to know that it was Thurid, for there was no other of the First Born north of the ice-barrier.

Thurid was speaking as I came within hearing of the men’s voices.

“Solan,” he was saying, “there is no risk and the reward is great. You know that you hate Salensus Oll and that nothing would please you more than to thwart him in some cherished plan. There be nothing that he more cherishes today than the idea of wedding the beautiful Princess of Helium; but I, too, want her, and with your help I may win her.

“You need not more than step from this room for an instant when I give you the signal. I will do the rest, and then, when I am gone, you may come and throw the great switch back into its place, and all will be as before. I need but an hour’s start to be safe beyond the devilish power that you control in this hidden chamber beneath the palace of your master. See how easy,” and with the words the black dator rose from his seat and, crossing the room, laid his hand upon a large, burnished lever that protruded from the opposite wall.

“No! No!” cried the little old man, springing after him, with a wild shriek. “Not that one! Not that one! That controls the sunray tanks, and should you pull it too far down, all Kadabra would be consumed by heat before I could replace it. Come away! Come away! You know not with what mighty powers you play. This is the lever that you seek. Note well the symbol inlaid in white upon its ebon surface.”

Thurid approached and examined the handle of the lever.

“Ah, a magnet,” he said. “I will remember. It is settled then I take it,” he continued.

The old man hesitated. A look of combined greed and apprehension overspread his none too beautiful features.

“Double the figure,” he said. “Even that were all too small an amount for the service you ask. Why, I risk my life by even entertaining you here within the forbidden precincts of my station. Should Salensus Oll learn of it he would have me thrown to the apts before the day was done.”

“He dare not do that, and you know it full well, Solan,” contradicted the black. “Too great a power of life and death you hold over the people of Kadabra for Salensus Oll ever to risk threatening you with death. Before ever his minions could lay their hands upon you, you might seize this very lever from which you have just warned me and wipe out the entire city.”