Mal Shaff, with doubled fists, saw the great thumb of his enemy slowly depressing a button on the cylinder, and a great fear held him rooted in his tracks. In the back of his brain something was vainly trying to explain to him the horror of this thing which the other held. Then a multicolored spiral, like a corkscrew column of vapor, sprang from the cylinder and flashed toward him. It struck him full on the chest and even as it did so he caught the ugly fire of triumph in the red eyes of his enemy. He felt a stinging sensation where the spiral struck, but that was all. He was astounded. He had feared this weapon, had been sure it portended some form of horrible death. But all it did was to produce a slight sting. For a split second he stood stock-still, then he surged forward and advanced upon Ouglat, his hands outspread like claws. From his throat came those horrible sounds, the speech of the fourth dimension. "Did I not tell you, foul son of Sargouthe, that I had solved a mystery you have never guessed at? Although you destroyed me long ago, I have returned. Throw away your puny weapon. I am of the lower dimension and am invulnerable to your engines of destruction. You bloated...." His words trailed off into a stream of vileness that could never have occurred to a third-dimensional mind. Ouglat, with every line of his face distorted with fear, flung the weapon from him, and turning, fled clumsily down the moor, with Mal Shaff at his heels. * * * * * Steadily Mal Shaff gained and with only a few feet separating him from Ouglat, he dived with outspread arms at the other's legs. The two came down together, but Mal Shaff's grip was broken by the fall and the two regained their feet at almost the same instant. The wild moor resounded to their throaty roaring and the high cliffs flung back the echoes of the bellowing of the two gladiators below. It was sheer strength now and flesh and bone were bruised and broken under the life-shaking blows that they dealt. Great furrows were plowed in the sand by the sliding of heavy feet as the two fighters shifted to or away from attack. Blood, blood of fourth-dimensional creatures, covered the bodies of the two and stained the sand with its horrible hue. Perspiration streamed from them and their breath came in gulping gasps. The lurid sun slid across the purple sky and still the two fought on. Ouglat, one of the ancients, and Mal Shaff, reincarnated. It was a battle of giants, a battle that must have beggared even the titanic tilting of forgotten gods and entities in the ages when the third-dimensional Earth was young.