"To get away from the light that is fatal to them, they build mounds like that behind us, of silicated, half-digested wood, which hardens into a sort of cement that will turn the cutting edge of steel. If you pry away some of the wall to spy on them, you get the fiasco I was just rewarded with. If you try to penetrate to the depths of the mystery, yards underground, by blowing up the termitary with gun powder, the only way of getting to the heart of things--you destroy the termites. Strays are seldom seen; in order, again, to avoid light and air-exposure, they tunnel underground or build tubes above ground to every destination. Always they keep hidden and secret. Always they work from within, which is why walls and boards they have devoured look whole: the outer shell has been left untouched and all the core consumed." "Can't you get at the beasts in the laboratory?" asked Jim. "No. If you put them into glass boxes to watch them, they manage to corrode the glass so it ceases to be transparent. And they can bore their way out of any wood, or even metal, containers you try to keep them in. The termite seems destined to remain a gruesome, marvelous, possibly deadly mystery." * * * * * He laughed abruptly, shrugged his shoulders, and started toward the car again. "When I get off on my subject, there's no telling when I'll stop. But, Jim, I tell you, I'd give years of my life to be able to do what all entomologists are wild to do--study the depths of a termite mound. God! What wouldn't I give for the privilege of shrinking to ant-size, and roaming loose in that secretive-looking mound behind us!" He laughed again, and slapped Holden's broad back. "_There_ would be a thrill for you, you bored adventurer! There would be exploration work! A trip to Mars wouldn't be in it. The nightmare monsters you would see, the hideous creations, the cannibalism, the horrible but efficient slave system carried on by these blind, intelligent things in the dark depths of the subterranean cells! Lions? Suppose you were suddenly confronted by a thing as big as a horse, with fifteen-foot jaws of steely horn that could slice you in two and hardly know it! How would you like that?" And now in the other man's eyes there was a glint, while his face expressed aroused interest. Every man to his own game, thought Denny curiously, watching the transformation. He lived for scientific experiments and observations having to do with termites. Holden existed, apparently, only for the thrill of pitting his brain and brawn against dangerous beasts, wild surroundings, or tempestuous elements. If only their two supreme interests in life could be combined.... "How would I like it?" said Jim. "Denny, old boy, when you can introduce me to an adventure like that ..." He waved his arm violently to complete the sentence. "What a book of travel it would make! 'The Raid on the Termites. Exploring an Insect Hell. Death in an Ant-hill....'"