“Pretty often, I’m afraid,” the Professor candidly confessed. “Now, for instance, there’s the rabbit-hutch and the hall-clock.” The Professor pointed them out. “One gets a little confused with _them_—both having doors, you know. Now, only yesterday—would you believe it?—I put some lettuces into the clock, and tried to wind up the rabbit!” “Did the rabbit _go_, after oo wounded it up?” said Bruno. The Professor clasped his hands on the top of his head, and groaned. “Go? I should think it _did_ go! Why, it’s _gone_! And where ever it’s gone to—that’s what I _ca’n’t_ find out! I’ve done my best—I’ve read all the article ‘Rabbit’ in the great dictionary—— Come in!” “Only the tailor, Sir, with your little bill,” said a meek voice outside the door. “Ah, well, I can soon settle _his_ business,” the Professor said to the children, “if you’ll just wait a minute. How much is it, this year, my man?” The tailor had come in while he was speaking. “Well, it’s been a doubling so many years, you see,” the tailor replied, a little gruffly, “and I think I’d like the money now. It’s two thousand pound, it is!” “Oh, that’s nothing!” the Professor carelessly remarked, feeling in his pocket, as if he always carried at least _that_ amount about with him. “But wouldn’t you like to wait just another year, and make it _four_ thousand? Just think how rich you’d be! Why, you might be a _King_, if you liked!” “I don’t know as I’d care about being a _King_,” the man said thoughtfully. “But it _dew_ sound a powerful sight o’ money! Well, I think I’ll wait——” “Of course you will!” said the Professor. “There’s good sense in _you_, I see. Good-day to you, my man!” “Will you ever have to pay him that four thousand pounds?” Sylvie asked as the door closed on the departing creditor. “_Never_, my child!” the Professor replied emphatically. “He’ll go on doubling it, till he dies. You see it’s _always_ worth while waiting another year, to get twice as much money! And now what would you like to do, my little friends? Shall I take you to see the Other Professor? This would be an excellent opportunity for a visit,“ he said to himself, glancing at his watch: “he generally takes a short rest—of fourteen minutes and a half—about this time.” Bruno hastily went round to Sylvie, who was standing at the other side of the Professor, and put his hand into hers. “I _thinks_ we’d like to go,” he said doubtfully: “only please let’s go all together. It’s best to be on the safe side, oo know!” “Why, you talk as if you were _Sylvie_!” exclaimed the Professor. “I know I did,” Bruno replied very humbly. “I quite forgotted I wasn’t Sylvie. Only I fought he might be rarver fierce!”