As they marched on down the street, attracting but little attention from the hurrying lizard-creatures, Rowan saw that in the great gray buildings on each side the doors opening into the street were of immense size, forty to fifty feet in height, and saw here and there a giant dinosaur entering or emerging from one of those great open doorways in obedience to the command of its lizard master. Then abruptly his two guards turned with him into one of them, and he found himself in a long, colossal corridor, its gray roof fifty feet above him and its width almost as great. Here and there along this great corridor were open doorways, and into one of these he was jerked by his guards, finding himself in the presence of three other of the lizard-creatures who sat behind a metal block much like a legless table. To these his guards spoke in their harsh voices. There was a moment of silence, and then a rasping command from one of the three, at which he was instantly reconducted from the room and down the corridor's length to a smaller, bolted door. A moment his captors fumbled with its bolt, then opened the door by sliding it down into an aperture in the floor, motioning Rowan inside and keeping the white globes full upon him. Hopelessly he stepped in, and the door slid up and shut behind him, while in a moment the bolts clanged shut outside. Rowan turned slowly around, then stood rigid. Across the room from him a single figure was staring at him, and as his eyes took in that figure a cry broke from him: "Morton!" 5 A single moment the other stared at him, unspeaking, a haggard, unshaven figure utterly different from the trim little scientist Rowan remembered, and then he came across the room, hands outstretched. "Rowan!" he cried, hoarsely. "Good God, you here, Rowan!" Then his thoughts shifted, lightning-like. "They've gone out, Rowan?" he asked. "These things--these creatures--they've started their attack?" "Yes," said the assistant. "Over Brinton, hours ago. I came--when you disappeared there in the swamp." Swiftly he spoke of the attack on Brinton, of his own crazed flight into the swamp, his own trip down the shaft and capture, and when he had finished Morton was silent, his face a mask. When at last he spoke it was in a whisper. "They've started," he whispered. "Over Brinton--and over all earth, now. And I who might have warned, captured----" "You were captured by them there in the swamp?" asked Rowan, quickly, and the other inclined his head. "Taken there by them, without a chance to escape. And taken down here....