The business was accomplished none too soon. The thing which Dynamon had feared might happen earlier, happened now. A force of humans, unprotected by tridium, emerged from the big gray Carrier and hastened toward Dynamon. A few minutes earlier and these men would have been mowed down by the Ray. The centurion sighed with relief and ordered the newcomers back to the Cosmos Carrier.

The danger was over.

Twenty minutes later, Dynamon had joined forces again with Mortoch's detachment and was marching back to the mouth of the pit, where Keltry and Thamon were waiting. The past hour had seen a complete and sweeping triumph for the humans. Mortoch's attack on the other Martian ship had been as successful as Dynamon's. Now, both of the Martian Carriers were captured, and their crews and warriors cut to pieces. And, all this had been accomplished with the loss of but one man. One of Mortoch's soldiers had fallen and dropped his lump of tridium. The man had instantly died under the Photo-Atomic Ray.

There remained only one more piece of business to conclude successfully the expedition to Saturn, and Dynamon set about it promptly. Once again he led the way down the pit to the Nether World.

There was great excitement at the bottom of the shaft. The Saturnians were disposing of the bodies of the Martians who had fallen in the first onslaught when Mortoch had proven the efficacy of tridium. And, as Dynamon landed among them, closely followed by Thamon, Keltry and the soldiers, the Saturnians crowded around in a condition bordering on hysteria. They had never before seen Martians, or even dreamed of their existence, so it was not to be wondered at that the primitive humans of the Nether World were excited when the sudden, fierce combat broke out almost in their midst. With the greatest difficulty, Dynamon quieted them down enough so that they heard and complied with his request to be taken to their Queen.

"Queen Diana," he said directly, "in your kingdom, you have any quantity—thousands of tons—of this luminous rock which we have identified as tridium. This substance is the one thing which can save the people of the Earth from the death-ray of the Martians. Will you give me your permission to carry away some of these rocks back to Earth, so that our armies can defend themselves against our enemies?"

The little Queen gave Dynamon a long languorous look.

"If you stay here and be my King," she answered, at length, "I will permit your people to carry away as many of the rocks as they want."

Dynamon's heart sank. He had hoped that Queen Diana had got over that idea. What was he going to do?

"Well, Queen Diana," he said, slowly, trying frantically to think of some way out, "I can't tell you how flattered I am at your proposal, but I don't see how I can accept it."