Although there was not really the least chance of anyone overhearing them, he leaned forward and almost whispered as he said:
"The Atlantean box contained something that had been brought from another world when our world was only just beginning."
"What?" asked Digory, who was now interested in spite of himself.
"Only dust," said Uncle Andrew. "Fine, dry dust. Nothing much to look at. Not much to show for a lifetime of toil, you might say. Ah, but when I looked at that dust (I took jolly good care not to touch it) and thought that every grain had once been in another world - I don't mean another planet, you know; they're part of our world and you could get to them if you went far enough - but a really Other World - another Nature another universe - somewhere you would never reach even if you travelled through the space of this universe for ever and ever - a world that could be reached only by Magic - well!" Here Uncle Andrew rubbed his hands till his knuckles cracked like fireworks.
"I knew," he went on, "that if only you could get it into the right form, that dust would draw you back to the place it had come from. But the difficulty was to get it into the right form. My earlier experiments were all failures. I tried them on guinea-pigs. Some of them only died. Some exploded like little bombs -"
"It was a jolly cruel thing to do," said Digory who had once had a guinea-pig of his own.
"How you do keep getting off the point!" said Uncle Andrew. "That's what the creatures were for. I'd bought them myself. Let me see - where was I? Ah yes. At last I succeeded in making the rings: the yellow rings. But now a new difficulty arose. I was pretty sure, now, that a yellow ring would send any creature that touched it into the Other Pace. But what would be the good of that if I couldn't get them back to tell me what they had found there?"
"And what about them?" said Digory. "A nice mess they'd be in if they couldn't get back!"
"You will keep on looking at everything from the wrong point of view," said Uncle Andrew with a look of impatience. "Can't you understand that the thing is a great experiment? The whole point of sending anyone into the Other Place is that I want to find out what it's like."
"Well why didn't you go yourself then?"
Digory had hardly ever seen anyone so surprised and offended as his Uncle did at this simple question. "Me? Me?" he exclaimed. "The boy must be mad! A man at my time of life, and in my state of health, to risk the shock and the dangers of being flung suddenly into a different universe? I never heard anything so preposterous in my life! Do you realize what you're saying? Think what Another World means - you might meet anything anything."
"And I suppose you've sent Polly into it then," said Digory. His cheeks were flaming with anger now. "And all I can say," he added, "even if you are my Uncle - is that you've behaved like a coward, sending a girl to a place you're afraid to go to yourself."