The cave, lighted up by a blazing fire, appeared to me a forbidding, uncanny place. Small, peculiar round holes, and dark cracks, suggestive of hidden vermin, gave me a creepy feeling; and although not over-sensitive on the subject of crawling, creeping things, I voiced my disgust. "Say, I don't like the idea of sleeping in this hole. I'll bet it's full of spiders, snakes and centipedes and other poisonous things." Whatever there was in my inoffensive declaration to rouse the usually slumbering humor of the Arizonians, and the thinly veiled ridicule of Colonel Jones, and a mixture of both in my once loyal California friend, I am not prepared to state. Maybe it was the dry, sweet, cool air of Nail Cañon; maybe my suggestion awoke ticklish associations that worked themselves off thus; maybe it was the first instance of my committing myself to a breach of camp etiquette. Be that as it may, my innocently expressed sentiment gave rise to bewildering dissertations on entomology, and most remarkable and startling tales from first-hand experience. "Like as not," began Frank in matter-of-fact tone. "Them's tarantuler holes all right. An' scorpions, centipedes an' rattlers always rustle with tarantulers. But we never mind them—not us fellers! We're used to sleepin' with them. Why, I often wake up in the night to see a big tarantuler on my chest, an' see him wink. Ain't thet so, Jim?" "Shore as hell," drawled faithful, slow Jim. "Reminds me how fatal the bite of a centipede is," took up Colonel Jones, complacently. "Once I was sitting in camp with a hunter, who suddenly hissed out: 'Jones, for God's sake don't budge! There's a centipede on your arm!' He pulled his Colt, and shot the blamed centipede off as clean as a whistle. But the bullet hit a steer in the leg; and would you believe it, the bullet carried so much poison that in less than two hours the steer died of blood poisoning. Centipedes are so poisonous they leave a blue trail on flesh just by crawling over it. Look there!" He bared his arm, and there on the brown-corded flesh was a blue trail of something, that was certain. It might have been made by a centipede. "This is a likely place for them," put in Wallace, emitting a volume of smoke and gazing round the cave walls with the eye of a connoisseur. "My archaeological pursuits have given me great experience with centipedes, as you may imagine, considering how many old tombs, caves and cliff-dwellings I have explored. This Algonkian rock is about the right stratum for centipedes to dig in. They dig somewhat after the manner of the fluviatile long-tailed decapod crustaceans, of the genera Thoracostraca, the common crawfish, you know. From that, of course, you can imagine, if a centipede can bite rock, what a biter he is." I began to grow weak, and did not wonder to see Jim's long pipe fall from his lips. Frank looked queer around the gills, so to speak, but the gaunt Stewart never batted an eye.