The tunnel through which I crawled was low and dark. I had followed it for several hundred yards when I felt a knot beneath my fingers. "Beyond the knots lies danger."
Now I went with the utmost caution, and a moment later a sharp turn in the tunnel brought me to an opening into a large, brilliantly lighted chamber.
The trend of the tunnel I had been traversing had been slightly upward, and from this I judged that the chamber into which I now found myself looking must be either on the first floor of the palace or directly beneath the first floor.
Upon the opposite wall were many strange instruments and devices, and in the center of the room stood a long table, at which two men were seated in earnest conversation.
He who faced me was a yellow man-a little, wizened-up, pasty-faced old fellow with great eyes that showed the white round the entire circumference of the iris.
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."
"And myself into the bargain," said Solan, with a shudder.
"But if you were to die, anyway, you would find the nerve to do it," replied Thurid.
"Yes," muttered Solan, "I have often thought upon that very thing. Well, First Born, is your red princess worth the price I ask for my services, or will you go without her and see her in the arms of Salensus Oll tomorrow night?"
"Take your price, yellow man," replied Thurid, with an oath. "Half now and the balance when you have fulfilled your contract."
With that the dator threw a well-filled money-pouch upon the table.
Solan opened the pouch and with trembling fingers counted its contents. His weird eyes assumed a greedy expression, and his unkempt beard and mustache twitched with the muscles of his mouth and chin. It was quite evident from his very mannerism that Thurid had keenly guessed the man's weakness-even the clawlike, clutching movement of the fingers betokened the avariciousness of the miser.
Having satisfied himself that the amount was correct, Solan replaced the money in the pouch and rose from the table.
"Now," he said, "are you quite sure that you know the way to your destination? You must travel quickly to cover the ground to the cave and from thence beyond the Great Power, all within a brief hour, for no more dare I spare you."
"Let me repeat it to you," said Thurid, "that you may see if I be letter-perfect."
"Proceed," replied Solan.
"Through yonder door," he commenced, pointing to a door at the far end of the apartment, "I follow a corridor, passing three diverging corridors upon my right; then into the fourth right-hand corridor straight to where three corridors meet; here again I follow to the right, hugging the left wall closely to avoid the pit.
"At the end of this corridor I shall come to a spiral runway, which I must follow down instead of up; after that the way is along but a single branchless corridor. Am I right?"
"Quite right, Dator," answered Solan; "and now begone. Already have you tempted fate too long within this forbidden place."
"Tonight, or tomorrow, then, you may expect the signal," said Thurid, rising to go.
"Tonight, or tomorrow," repeated Solan, and as the door closed behind his guest the old man continued to mutter as he turned back to the table, where he again dumped the contents of the money-pouch, running his fingers through the heap of shining metal; piling the coins into little towers; counting, recounting, and fondling the wealth the while he muttered on and on in a crooning undertone.
Presently his fingers ceased their play; his eyes popped wider than ever as they fastened upon the door through which Thurid had disappeared. The croon changed to a querulous muttering, and finally to an ugly growl.
Then the old man rose from the table, shaking his fist at the closed door. Now he raised his voice, and his words came distinctly.
"Fool!" he muttered. "Think you that for your happiness Solan will give up his life? If you escaped, Salensus Oll would know that only through my connivance could you have succeeded. Then would he send for me. What would you have me do? Reduce the city and myself to ashes? No, fool, there is a better way-a better way for Solan to keep thy money and be revenged upon Salensus Oll."
He laughed in a nasty, cackling note.
"Poor fool! You may throw the great switch that will give you the freedom of the air of Okar, and then, in fatuous security, go on with thy red princess to the freedom of-death. When you have passed beyond this chamber in your flight, what can prevent Solan replacing the switch as it was before your vile hand touched it? Nothing; and then the Guardian of the North will claim you and your woman, and Salensus Oll, when he sees your dead bodies, will never dream that the hand of Solan had aught to do with the thing."
Then his voice dropped once more into mutterings that I could not translate, but I had heard enough to cause me to guess a great deal more, and I thanked the kind Providence that had led me to this chamber at a time so filled with importance to Dejah Thoris and myself as this.
But how to pass the old man now! The cord, almost invisible upon the floor, stretched straight across the apartment to a door upon the far side.