Strawberry did the most natural thing in the world. Being very thirsty （and no wonder） he walked slowly across to the nearest pool and stepped into it to have a drink. Digory was still holding the Witch‘s heel and Polly was holding Digory’s hand. One of the Cabby‘s hands was on Strawberry； and Uncle Andrew， still very shaky， had just grabbed on the Cabby’s other hand.
“Quick，” said Polly， with a look at Digory. “Greens！”
So the horse never got his drink. Instead， the whole party found themselves sinking into darkness. Strawberry neighed； Uncle Andrew whimpered. Digory said， “That was a bit of luck.”
There was a short pause. Then Polly said， “Oughtn‘t we to be nearly there now？”
“We do seem to be somewhere，” said Digory. “At least I’m standing on something solid.”
“Why， so am I， now that I come to think of it，” said Polly. “But why‘s it so dark？ I say， do you think we got into the wrong Pool？”
“Perhaps this is Charn，” said Digory. “Only we’ve got back in the middle of the night.”
“This is not Charn，” came the Witch‘s voice. “This is an empty world. This is Nothing.”