Into the Trap-Door City of great spiders goes Penrun after the hidden plunder of the space-pirate Halkon. an excerpt from the beginning of the story:- Dick Penrun glanced up incredulously. "Why, that's impossible; you would have to be two hundred years old!" he exclaimed. Lozzo nervously ran a hand through his white mop of hair. "But it is true, Sirro," he assured his companion. "We Martians sometimes live three centuries. You should know that I am only a hundred and seventy-five, and I do not lie when His voice sank to a whisper, and he glanced apprehensively about the buffet of the Western Star which was due now in three days at the Martian city of Nurm. Penrun's eyes followed his anxious glances curiously. The buffet was partly filled with passengers, smoking, gossiping women, and men at cards, or throwing dice in the Martian gambling game of diklo, which was the universal fad of the moment. No place could have been safer, Penrun reflected. Doubtless the old man's caution was a lifelong habit acquired in his youth, if he had actually served under Halkon. Before long the old codger would be saying that he knew the hiding place of Halkon's treasure, about which there were probably more legends and yarns than anything else in the Universe. A century had elapsed since the death of the famous pirate who had preyed on the shipping of the Void with fearless, ruthless audacity and had piled up a fabulous treasure before that fatal day when the massed battle spheres of the Interplanetary Council trapped his ships out near Mercury and blew them to atoms there in the sun-beaten reaches of space. Some of the men had been captured; old Lozzo might have been one of them. Penrun knew the history of Halkon from childhood, and for a very good reason.