I got right at it the very next morning. I opened the office myself and began studying my notes to see how broad a claim I could write for the Tearproof Paper Case. I listed all the ingredients in one column, and then filled up the adjacent columns with all the possible substitutes I could think of. I didn't even know it when Susan arrived at the office, stood in my doorway for a moment, and then tip-toed away. Later on Mr. Spardleton looked in on me, and I wasn't aware of that, either. It was ten o'clock before I finally came up for air, and then I dashed out to the Marchare Laboratory for another talk with Callahan. I explained how I was going to handle the case to make sure we got a good, broad patent application into the Patent Office. "Can you do that?" he asked. "Oh, yes. We can put in all the things we think will work, but if we are wrong we are in some degree of trouble. But I feel that with both of us working on this we ought to be able to turn out a good sound job. I'll keep sending you drafts out in San Francisco until we finally get one we think good enough to file. But we can't waste time. This is a hot one, and we want to get it in as soon as possible." He shrugged his shoulders, and we sat down to work on my lists. Neither one of us realized it when lunch time came and went. But that's the way it is with world-beater inventions; they sweep you along. Early that afternoon I dictated my first draft to Susan. Callahan and I went over the draft, and then he left for San Francisco. The next time around we had to use air mail. With each new draft we added more to the basic information we had, rounding out the invention in ever greater detail. I added example after example, being careful to state them in the present tense; I did not want to give the impression that the examples had actually been run. In a month's time I checked with John Bostick. Bostick had been able to duplicate Callahan's work, and we had three more, flimsy, diaphanous sheets that could not be torn by human hands. That was all I needed. Now I knew that anyone could duplicate the Tearproof Paper, and I had at least one, good, substantial working example for my patent application. The knowledge gave me greater confidence in the alternate materials and procedures that Callahan and I had dreamed up. I prepared a final draft containing twenty-three pages of detailed specification and eleven examples and topped it all off with forty-six claims. It was a magnificent application, considering what I had to start with. I handed it to Mr. Spardleton and sat down to hear what he had to say about it. I watched him out of the corner of my eye as he read it, and I had the pleasure of seeing his cigar slowly swing outward until the glowing end was almost beneath one of his ears. This, I knew, was his Amazed Position, and it was rare indeed that I or anyone else ever saw it. Mr. Spardleton was a man who does not amaze easily.