"Look, Milt, what's the basic problem? Why do security measures strangle research? Isn't it a matter basically of a breakdown in the interchange of ideas? Sure, and it has come about because there has been no method of communication which would not get to and be used by our enemies. So, like yourself, I'm forbidden to publish the results of my work here in the journals. Why? Because those results are in my field of study, chain reactions. "I'm frustrated just as you have been and science suffers. What do I do? I write articles in a field that isn't restricted, botany. It's a new field of interest to me, a hobby if you like. The stuff is published and gets wide distribution. Every decent library in the country gets it. Every scientist all over the country can read the papers if he cares to. Then the word gets around, by the scientific grapevine, with a little judicious ear-bending. I get a reputation--in Botany. "Now the botanists know that I am not a botanist. They understand what I am doing. The word spreads, and they leave my stuff alone. The physicists in my specialty know my name, and they get the word, and pretty soon they are glancing over certain botany journals apparently for relaxation. They read my papers. It's slow, but it works." Mason leaned forward and struck a large stick match under the lab bench top. Drawing several puffs through his pipe his eyes were on Collins' confused face. Then he laid the pipe down. "The enemy botanists may read the botany journals, sure, but the enemy physicists don't. Their totalitarian training has made them inflexible in their thinking, besides they have their hands full trying to keep up in their own fields. The curse of specialization is a blessing to us. When the enemy botanists read it, it makes sense, but it doesn't help them much in their work--more or less innocuous." He waved toward the botany texts on his desk. "It took me six months to learn enough about it to do the job." As he spoke Mason untangled his legs and brought the open journal over to his desk. "All right, notice in my article I am writing on chromosomes--chains of genes, and my field is--?" "Chain reactions," Collins finished softly, "but--" "The article itself is well disguised, but it's a parable. It's botany on the surface, but it gets over enough chain-reaction theory to be good physics, if you read it right. You see botany is what you might call my code field." The bright light of noon shimmered on the white buildings and green lawns beyond the lab windows. Collins was silent and thoughtful. "Well, that's about all. Gordon knows. He's in with us, but the Government doesn't suspect--yet. Oh, they may catch on to us. Information may leak out to the enemy. There's some chance, but when we're caught we'll think of something else. Most of us believe it's worth the chance. There's a risk in anything."