Tommy inspected his surroundings with an infinite care. As the darkness deepened he meditatively taped a flashlight below the barrel of the sub-machine gun. Turned on, it would cast a pitiless light upon his target, and the sights would be silhouetted against the thing to be killed. He hung his grenades in a handy row just inside the mouth of the Tube and set his gas bombs conveniently in place, then settled down to watch. It was assuredly necessary. Von Holtz's story confirmed his own and Denham's guesses and made their worst fears seem optimistic. Von Holtz had made a Tube for Jacaro, working from the model of Tommy's own construction. It had been completed nearly a month before. But no jungle odors had seeped through that other Tube on its completion. It opened in a sub-cellar of a structure in the Golden City itself, the city of towers and soaring spires Denham had glimpsed long months before. By sheer fortune it opened upon a rarely used storeroom where improbable small animals--the equivalent of rats--played obscenely in the light of ever-glowing panels in the wall. For two days of the Fifth-Dimension world Jacaro and his gunmen lay quiet. During two nights they made infinitely cautious reconnaissance. The second night it was necessary to kill two men who sighted the tiny exploring party. But the killing was done with silenced automatics, and there was no alarm. The third night they lay still, fearing an ambush. The fourth night Jacaro struck. * * * * * He and his men fled back to their Tube with plunder and precious gems. Their loot was vast even beyond their hopes, though they had killed other men in gathering it. The Golden City was rich beyond belief. The very crust of the Fifth-Dimension world seemed to be composed of other substances than those of Earth. The common metals of Earth were rare or even unknown. The rarer metals of Earth were the commonplace ones in the Golden City. Even the roofs seemed plated with gold, but Jacaro's gunmen saw not one particle of iron save in a ring they took from a dead man's finger. There, an acid-etched plate of steel was set as if to be used for a signet. Von Holtz had accompanied the raiders perforce on every journey. Jeweled bearings for motors; objects of commonest use, made of gold beat thin for lightness; huge ingots of silver for industry; once a queer-shaped spool of platinum wire that it took two men to carry--these things made up the loot they scurried back to their rathole with. Five raids they made, and twenty men they shot down before they came upon disaster. On the sixth raid an outcry rose and an ambush fell upon them. Flashes of incredibly vivid actinic flame leaped from queer engines that opened upon them. Curious small truncheonlike weapons spat paralyzing electric shocks upon them. The twelve gangsters fought with the desperation of cornered rats, with notched and explosive bullets and with streams of lead from tommy-guns.