But he was right about the periodicity of Fluff. Almost on the minute at the end of forty-eight hours Fluff returned, and Brownlee and Murchison, who were there to receive him, were as pleased as if Fluff had been going away instead of returning.
“That dog,” said Brownlee, “is a wonderful animal. If Sir Isaac Newton had that dog, he would have proved something or other of universal value by him. That dog is plumb full of ratios and things, if we only knew how to get them out of him. I bet if Sir Isaac Newton had had Fluff as long as you have had him he would have had a formula all worked out—x/y(2xz-dog)=2(4ab-3x) or something of that kind, so that anyone with half a knowledge of algebra could figure out the square root of any dog any time of the day or night. I could get up a Law of Dog myself if I had the time, with a dog like Fluff to work on. 'If one dog travels fourteen hundred and forty miles at the sight of a gun, how far would two dogs travel?' All that sort of thing. Stop!” he ejaculated suddenly. “If one dog travels forty-eight hours at the sight of one gun, how far would he travel at the sight of two guns? Murchison,” he cried enthusiastically, “I've got it! I've got the fundamental law of periodicity in dogs! Go get your gun,” he said to me, “and I will get mine.”
He stopped at the gate long enough to say:
“I tell you, Murchison, we are on the verge of a mighty important discovery—a mighty important discovery! If this thing turns out right, we will be at the root of all dog nature. We will have the great underlying law of scared dogs.”
He came back with his shotgun carefully hidden behind him, and then he and I showed Fluff the two guns simultaneously. For one minute Fluff was startled. Then he vanished. All we saw of him as he went was the dust he left in his wake. Massett had come over when Brownlee brought over his gun, and Murchison and I sat and smoked while Massett and Brownlee fought out the periodicity of Fluff. Brownlee said that for two guns Fluff would traverse the same distance as for one, but twice as quickly; but Massett said Brownlee was foolish, and that anyone who knew anything about dogs would know that no dog could go faster than Fluff had gone at the sight of one gun. Massett said Fluff would travel at his regular one-gun speed, but would travel a two-gun distance. He said Fluff would not be back for ninety-six hours. Brownlee said he would be back in forty-eight hours, but both agreed that he would travel twenty-eight hundred and eighty miles. Then Murchison went home and got a map, and showed Brownlee and Massett that if Fluff traveled fourteen hundred miles in the direction he had started he would have to do the last two hundred miles as a swim, because he would strike the Atlantic Ocean at the twelve hundredth mile. But Brownlee just turned up his nose and sneered. He said Fluff was no fool, and that when he reached the coast he would veer to the north and travel along the beach for two hundred miles or so. Then Massett said that he had been thinking about Brownlee's theory, and he knew no dog could do what Brownlee said Fluff would do—sixty miles an hour. He said he agreed that a dog like Fluff could do thirty miles an hour if he did not stop to howl, because his howl represented about sixty horse power, but that no dog could ever do sixty miles an hour. Then Brownlee got mad and said Massett was a born idiot, and that Fluff not only could do sixty miles, but he could keep on increasing his speed at the rate of thirty miles per gun indefinitely. Then they went home mad, but they agreed to be on hand when Fluff returned. But they were not. Fluff came home in twenty-four hours, almost to the minute.
When I went over and told Brownlee, he wouldn't believe it at first, but when I showed him Fluff, he cheered up and clapped me on the back.
“I tell you,” he exclaimed, “we have made a great discovery. We have discovered the law of scared dogs. 'A dog is scared in inverse ratio to the number of guns!' Now, it wouldn't be fair to try Fluff again without giving him a breathing spell, but to-morrow I will come over, and we will try him with four guns. We will work this thing out thoroughly,” he said, “before we write to the Academy of Science, or whatever a person would write to, so that there will be no mistake. Before we give this secret to the world we want to have it complete. We will try Fluff with any number of guns, and with pistols and rifles, and if we can get one we will try him with a cannon. We will keep at it for years and years. You and I will be famous.”