He nodded, keeping a straight and sober face as if we were exchanging admiring remarks about the techniques of clothes repairing, instead of conspiring. After the meeting, Caswell drew the tall woman in the green suit aside and spoke to her confidentially, showing her the diagram of organization we had drawn up. I saw the responsive glitter in the woman's eyes and knew she was hooked. We left the diagram of organization and our typed copy of the new bylaws with her and went off soberly, as befitted two social science experimenters. We didn't start laughing until our car passed the town limits and began the climb for University Heights. If Caswell's equations meant anything at all, we had given that sewing circle more growth drives than the Roman Empire. * * * * * Four months later I had time out from a very busy schedule to wonder how the test was coming along. Passing Caswell's office, I put my head in. He looked up from a student research paper he was correcting. "Caswell, about that sewing club business--I'm beginning to feel the suspense. Could I get an advance report on how it's coming?" "I'm not following it. We're supposed to let it run the full six months." "But I'm curious. Could I get in touch with that woman--what's her name?" "Searles. Mrs. George Searles." "Would that change the results?" "Not in the slightest. If you want to graph the membership rise, it should be going up in a log curve, probably doubling every so often." I grinned. "If it's not rising, you're fired." He grinned back. "If it's not rising, you won't have to fire me--I'll burn my books and shoot myself." I returned to my office and put in a call to Watashaw. While I was waiting for the phone to be answered, I took a piece of graph paper and ruled it off into six sections, one for each month. After the phone had rung in the distance for a long time, a servant answered with a bored drawl: "Mrs. Searles' residence." I picked up a red gummed star and licked it. "Mrs. Searles, please." "She's not in just now. Could I take a message?" I placed the star at the thirty line in the beginning of the first section. Thirty members they'd started with. "No, thanks. Could you tell me when she'll be back?" "Not until dinner. She's at the meetin'." "The sewing club?" I asked. "No, sir, not that thing. There isn't any Sewing club any more, not for a long time. She's at the Civic Welfare meeting." Somehow I hadn't expected anything like that. "Thank you," I said and hung up, and after a moment noticed I was holding a box of red gummed stars in my hand. I closed it and put it down on top of the graph of membership in the sewing circle. No more members....