He began dating his scientific notes as he worked, something he had never done before. Weiner once remarked casually that his new parton notes represented “a record of the day-to-day work,” and Feynman reacted sharply. “I actually did the work on the paper,” he said. “Well,” Weiner said, “the work was done in your head, but the record of it is still here.” “No, it’s not a record, not really. It’s working. You have to work on paper, and this is the paper. Okay?” It was true that he wrote in astonishing volume as he worked—long trains of thought, almost suitable to serve immediately as lecture
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