The next day, Archimedes snuck out to his stash and pulled out one of the other flint nodules. He had the knapping tools that the elder had given him. He turned the nodule over and examined it for almost a half hour without actually doing anything with it. It was pretty obvious that he had something in mind and didn’t want to screw it up. I watched with great interest, and I sensed Marvin watching over my shoulder, VR-wise.