A gleam of soft light--they were passing more radio-active patches. He felt the wild convulsive struggles of Lanier against the thing; and then suddenly the tunnel ended, debouched into a far-stretching, low-ceilinged cavity. It was feebly illuminated by radio-active patches here and there in walls and ceiling, and as the monster that held them halted on entering the cavity, Randall and Lanier lay in its grip and stared across the weird place with intensified horror. For it was swarming with countless worm monsters! All were like the one who held them, thick long worm bodies with projecting tentacles and with black eyeless faces. They were crawling to and fro in this cavern far beneath the surface, swarming in hordes around and over each other, pouring in and out of the awful place from countless tunnels that led upward and downward from it! * * * * * A world of worm monsters, beneath the surface of the Martian jungles! As Randall stared across that swarming, dim-lit cave of horror, physically sick at sight of it, he remembered the countless tunnel openings they had glimpsed in their flight through the jungle, and remembered the remark of the Martian who had first guided them across the city, that in the jungles were living things, of a sort. These were the things, worm monsters whose unthinkable networks of tunnels and burrows formed beneath the surface a veritable worm world! "Randall!" It was Lanier's thick exclamation. "Randall--those scar-marks on their--faces--you see--?" "See?" "Those marks! These creatures had eyes once but must have been forced down here by the Martians. These may once have been--ages ago--human!" At that thought Randall felt horror overcoming his senses. He was aware that the great worm monster holding them was dragging them forward through the cavern, that others of the swarms there were crowding around them, feeling them blindly with their tentacles, helping to drag them forward. Half-carried and half-dragged they went, scores of tentacles now holding them, great worm shapes crawling forward on all sides of them and accompanying them along the cavern's length. He glimpsed worm monsters here and there emerging from the upward tunnels with masses of strange plant stuff in their grasp that others blindly devoured. His senses reeled from the suffocating air, the great cavity being but a half-score feet in height, burrowed from the damp earth by these numberless things. * * * * *