"Pia-san named them monads," said the carpenter, white-bearded Togo. "We all have them in our bodies. You have them now in yours. Our soil is alive with them. They chew the chaff of our fields into black loam; they turn to dust the flesh of our fathers. They cause turnips to become _takuwan_." Hartford rocked back from the microscope to sit again on his heels. "You have no disease, no benign bacterial flora and of course no bacterial antibodies. Instead you have this whip-tailed animalcule, this monad. Is this correct?" "So Pia-san said," Takeko agreed. "He said that the monad is a jealous beast. It is a tiger among the pygmies, he said. No little nuisance-makers can exist on Kansas; the monad would eat them in a rage." "The ultimate antibiotic," Hartford said. "A micro-organism that functions as a saprophyte, a soil-former and a scavenger. Besides all this, it's a universal phagocyte, policing up the human environment inside and out, to keep it clean of any other microscopic organisms. The monad fills every niche in the micro-ecology of the planet." "This is what Pia-san and his _okusama_, poor dead girl, discovered," Takeko said. "Renkei entered the Stone House to tell you that we do not stink, that we are not dangerous. Three people have died to tell this--and Nef still does not know." "I think he may know it after all," Hartford said. "He knows about the monad, and fears it. This little bug means that every member of the human race can join his damned Brotherhood. A crew of monads in his gut would make every man on Stinker Earth a dignotobiote, germ-free except for his housekeeping protozoa." "Until Pia-san told us," Yamata said, "we knew nothing except that we lived longer than our ancestors had. We knew that we did not suffer from the strange tirednesses the books told of, ills caused by the little animals. We did not know that the smallest natives of this planet had made of us their fortresses." "If I could only get past Nasty Nef to tell this to the Axenites," Hartford said. "_Ron yori shoko_," Kiwa-san said. Takeko translated for her father. "He says, Proof is stronger than argument." "Indeed," Hartford agreed. "But how do I prove to the troopers that the monad sweeps Kansas cleaner than their Barracks floors?" "As Pia-san tried to," Takeko said. "He removed his glasshead and his silken suit. He breathed our air and ate our food. He wanted to prove that he could live, but he was killed before he could. Now you have made that proof. Your brothers of the Stone House must undress of their silken suits and come among us, Lee-san." * * * * *