mechanic who devised Nature. The thing had him, in any case, if he could not kick or struggle or cut free. Cut free! That was it. He had a knife, in the side pocket of his coveralls. He dug for it, almost dropped it from his muddy fingers, then yanked open the biggest blade. He slashed at the nearest tentacle, the one around his waist. It parted like a cane-stalk before a machete. The other arms quivered and slackened, plainly shocked by pain. Planter rolled out of their grip, started to swim away anywhere. He looked over his shoulder and saw his enemy as it humped itself partially into view. Not such an octopus, after all. The dispassionate part of Planter's brain called the thing an animated tall tree. The slender tentacles sprouted from a thicker trunk, that could curve and writhe and wallow, but not so readily. It was of a rubbery gray-brown, and at the upper end, nested among the tentacle-roots, was what must be its mouth. That mouth opened and shut in almost wistful hunger. Planter swam furiously. He wanted to reach and climb the stern of the rocket ship, but the thing knew his wish, and moved to head him off. He kicked and fought his way toward the far mass of leaves that bordered this mud-pit. From among those leaves glowed for an instant a sort of splinter of yellow light. A small object sang over Planter's helmeted head like a bee, and struck behind him with a little chock. It must have found lodgment against the hall-tree thing, which paused in its pursuit to flop and spatter the mud with its tentacles. Planter blessed the diversion, whatever it was, and strove nearer to the shore. The forest was alive, he suddenly decided. Out of its misty tangle a great leafy branch swung knowingly toward him. He clutched at it, brought away a fat, moist handful of strange-shaped leaves. His other hand made good its hold on the branch itself, and with the last of his strength he dragged himself to where roots hummocked above the mud. Then he saw where the branch had come from. A slim, active figure stood among the stems, pressing with both hands upon the base of the branch to make it move into the open. As Planter scrambled to safety, the figure relaxed its helpful shoving, and the branch moved back toward the perpendicular. Planter gazed in utter lost unbelief at this stranger. It