"This is no good," he said. "It's not an empty house at all. We'd better bunk before anyone comes."
"What do you think those are?" said Polly, pointing at the coloured rings.'
"Oh come on," said Digory. "The sooner-"
He never finished what he was going to say for at that moment something happened. The high-backed chair in front of the fire moved suddenly and there rose up out of it - like a pantomime demon coming up out of a trapdoor the alarming form of Uncle Andrew. They were not in the empty house at all; they were in Digory's house and in the forbidden study! Both children said "O-o-oh" and realized their terrible mistake. They felt they ought to have known all along that they hadn't gone nearly far enough.
Uncle Andrew was tall and very thin. He had a long clean-shaven face with a sharply-pointed nose and extremely bright eyes and a great tousled mop of grey hair.
Digory was quite speechless, for Uncle Andrew looked a thousand times more alarming than he had ever looked before. Polly was not so frightened yet; but she soon was. For the very first thing Uncle Andrew did was to walk across to the door of the room, shut it, and turn the key in the lock. Then he turned round, fixed the children with his bright eyes, and smiled, showing all his teeth.
"There!" he said. "Now my fool of a sister can't get at you!"
It was dreadfully unlike anything a grown-up would be expected to do. Polly's heart came into her mouth, and she and Digory started backing towards the little door they had come in by. Uncle Andrew was too quick for them. He got behind them and shut that door too and stood in front of it. Then he rubbed his hands and made his knuckles crack. He had very long, beautifully white, fingers.
"I am delighted to see you," he said. "Two children are just what I wanted."
"Please, Mr Ketterley," said Polly. "It's nearly my dinner time and I've got to go home. Will you let us out, please?"
"Not just yet," said Uncle Andrew. "This is too good an opportunity to miss. I wanted two children. You see, I'm in the middle of a great experiment. I've tried it on a guinea-pig and it seemed to work. But then a guinea-pig can't tell you anything. And you can't explain to it how to come back."
"Look here, Uncle Andrew," said Digory, "it really is dinner time and they'll be looking for us in a moment. You must let us out."
"Must?" said Uncle Andrew.
Digory and Polly glanced at one another. They dared not say anything, but the glances meant "Isn't this dreadful?" and "We must humour him."
"If you let us go for our dinner now," said Polly, "we could come back after dinner."
"Ah, but how do I know that you would?" said Uncle Andrew with a cunning smile. Then he seemed to change his mind.
"Well, well," he said, "if you really must go, I suppose you must. I can't expect two youngsters like you to find it much fun talking to an old buffer like me." He sighed and went on. "You've no idea how lonely I sometimes am. But no matter. Go to your dinner. But I must give you a present before you go. It's not every day that I see a little girl in my dingy old study; especially, if I may say so, such a very attractive young lady as yourself."
Polly began to think he might not really be mad after all.
"Wouldn't you like a ring, my dear?" said Uncle Andrew to Polly.
"Do you mean one of those yellow or green ones?" said Polly. "How lovely!"
"Not a green one," said Uncle Andrew. "I'm afraid I can't give the green ones away. But I'd be delighted to give you any of the yellow ones: with my love. Come and try one on."
Polly had now quite got over her fright and felt sure that the old gentleman was not mad; and there was certainly something strangely attractive about those bright rings. She moved over to the tray.
"Why! I declare," she said. "That humming noise gets louder here. It's almost as if the rings were making it."
"What a funny fancy, my dear," said Uncle Andrew with a laugh. It sounded a very natural laugh, but Digory had seen an eager, almost a greedy, look on his face.
"Polly! Don't be a fool!" he shouted. "Don't touch them."
It was too late. Exactly as he spoke, Polly's hand went out to touch one of the rings. And immediately, without a flash or a noise or a warning of any sort, there was no Polly. Digory and his Uncle were alone in the room.