Expand? How did he know but that he had taken the wrong drug? Well, he could soon rectify that. . . . A panic swept Martt that the giant might awaken too soon. . . . The drug was taking effect; Martt was sick and dizzy. He reeled to a post at an outer corner of the platform. Clung there. He all but slipped and fell into the water ten feet below. A moment, then the sickness passed. He was growing! He could feel the post shrinking within his grip. The outlines of the houses were contracting. The knife in his hand, already tiny, slipped and fell into the water with a splash. The post soon was too small for Martt to hold. He reached over and steadied himself upon the grass roof of the nearest house. It was melting under his hands. The sleeping giant lay at his feet, a giant no longer; a man, like himself--the two of them crowding a tiny, flimsy platform with toy houses beside it, and black water flowing sluggishly close underneath. A sense of power swept Martt. A triumph. He was not afraid of this man, unarmed like himself. Already the man was undersized. . . . Why, Martt could grip him, choke him! . . . These toy houses--a sweep of Martt's arm would have scattered them. Martt was bending awkwardly over the roof-tops. A ripping, tearing noise sounded. The platform, the houses, quivered, wavered, collapsed! The whole structure, bending beneath the weight of the two huge bodies, gave way. Martt found himself floundering in warm, muddy water, entangled in a debris of splintered wood and grasslike house-roofs. And with him, his antagonist, awakened to a startled confusion, floundering, struggling to get upon his feet. Martt rose to his knees. The shallow lake bottom was sticky with mud. A house-roof hung upon his shoulder. He heaved it off; stood upright, dripping, breathless. The other man was up also. In the starlight, amid the floating wreckage, they faced each other. Martt was the taller; and he was still growing. He saw his enemy shrinking before him. A slim young fellow, with long black hair. A broad, flat face, with a startled surprize on it. Martt laughed. And shouted, "I've got you now!" He would have leaped. But abruptly he recalled Zee, tiny in size, huddled there by the shore. A lunge of his body--or of this other man's body--a flip of one of these torn housebeams--and Zee would be killed. . . . Martt turned and waded rapidly away. He wondered if the other man would follow him. Martt wanted to get him farther out into the lake. It was an error; for as Martt turned to look back, he saw his antagonist's hand go to his belt; and then to his mouth. More of the drug! Martt thought that he had in his own pocket all there was of it here. But the giant had more. Already he was growing. As Martt stood undecided, he saw the giant growing like himself. He was smaller than Martt now, but growing more swiftly. He stood for an instant with his arms upflung toward the stars; then he came wading forward.