Without looking back, he stepped over the loose door and continued on his way. Eventually, he came to another such barrier, and he dealt with it in the same fashion. The third time he was halted, he found himself at a vertical column which passed down through an oval opening in the ceiling and disappeared through another in the floor of the corridor. The man hesitated. A vague sadness flitted across his features. Then, as if driven by some deep purpose, he approached the column. It was about six inches in diameter, and the most regular shape he had encountered anywhere. The surface of it was ringed by horizontal grooves nearly an inch deep, and looked as if it would be easy to climb. From the hole below, there rose slightly warmer air, bearing a blend of pungent and musty odors. The man's nostrils wrinkled. He stepped to the edge of the opening, then sidled around until he had the greatest possible space on his side of the column. The instrument in his hand finally came to his attention as he reached out to touch the grooved surface. He considered it for a long moment. Apparently, he was pleased at the brilliance of the thought that eventually moved him to thrust the thing into a pocket of his pants. He faced the column again, and again hesitated. His right hand lifted an inch, indecisively, following which a snarl of pain twisted his lips. Sidling around the opening once more until he found himself having completed a circuit, he let the fingers of his left hand explore the grooves. It did not seem to occur to him to look either down or up, although faint, distant sounds were borne to him on the current of odoriferous air. In the end, he leaned forward until his left shoulder came against the slim column. He wrapped his left arm about it. A little scrambling, and he had gripped it between his legs. Then a slight relaxation of his hold permitted him to slide gradually downward until he slipped past the floor line. There were only a few inches to spare between his shoulders and the edge of the opening, as if the latter had not been designed for such as he. The next level into which he descended was dark. He continued to slide cautiously downward. At the second level below his starting point, there was light. The corridor resembled that in which he had begun his journey. He put out one foot to catch the edge of the opening while he rested. This hallway curved not far from the man in one direction, although the other side ran straight for about twenty feet before being closed off by a door similar to the one he had removed. Around the bend floated faint noises suggesting high-pitched conversation, although they came from too far away to reveal the nature of their origin. The tall man kept one eye cocked warily in that direction. After a few minutes, certain sounds seemed to draw nearer. The cluttering "talk" faded, but he could hear more plainly a hushed scuffling that could have been caused by many feet taking short, hurried steps.