"So do I; but it's too late now. You have to leave these things very largely to the screw-driver. Besides, elephants often do have their heads sideways; I've noticed it at the Zoo." "Well, never mind. I think it's very clever of you to do it at all. Now then, you go in, and I'll knock and see if you hear." I went in and shut the door, Celia remaining outside. After five seconds, having heard nothing, but not wishing to disappoint her, I said, "Come in," in the voice of one who has been suddenly disturbed by a loud "rat-tat." "I haven't knocked yet," said Celia from the other side of the door. "Why not?" "I was admiring him. He _is_ jolly. Do come and look at him again." I went out and looked at him again. He really gave an air to the library door. "His face is rather dirty," said Celia. "I think he wants some brass polish and a--and a bun." She ran off to the kitchen. I remained behind with Jumbo and had a little practice. The knock was not altogether convincing, owing to the fact that his chin was too receding for his trunk to get at it properly. I could hear it quite easily on my own side of the door, but I felt rather doubtful whether the sound would penetrate into the room. The natural noise of the elephant--roar, bark, whistle, or whatever it is--I have never heard, but I am told it is very terrible to denizens of the jungle. Jumbo's cry would not have alarmed an ant. Celia came back with flannels and things and washed Jumbo's face. "There!" she said. "Now his mother would love him again." Very confidently she propelled his trunk against his chin and added, "Come in." "You can hear it quite plainly," I said quickly. "It doesn't re--rever--reverberate--is that the word?" said Celia, "but it's quite a distinctive noise. I'm sure you'd hear it." "I'm sure I should. Let's try." "Not now. I'll try later on, when you aren't expecting it. Besides, you must begin your work. Good-bye. Work hard." She pushed me in and shut the door. I began to work. I work best on the sofa; I think most clearly in what appears to the hasty observer to be an attitude of rest. But I am not sure that Celia really understands this yet. Accordingly, when a knock comes at the door I jump to my feet, ruffle my hair, and stride up and down the room with one hand on my brow. "Come in," I call impatiently, and Celia finds me absolutely in the throes. If there should chance to be a second knock later on, I make a sprint for the writing-desk, seize pen and paper, upset the ink or not as it happens, and present to any one coming in at the door the most thoroughly engrossed back in London. But that was in the good old days of knuckle-knocking. On this particular morning I had hardly written more than a couple of thousand words--I mean I had hardly got the cushions at the back of my head comfortably settled when Celia came in. "Well?" she said eagerly. I struggled out of the sofa. "What is it?" I asked sternly. "Did you hear it all right?"