For now a great barrier of cliffs rose before them and they were almost dazzled by the sunlight dancing on the great waterfall by which the river roars and sparkles down into Narnia itself from the high western lands in which it rises. They were flying so high already that the thunder of those falls could only just be heard as a small， thin sound， but they were not yet high enough to fly over the top of the cliffs.
“We‘ll have to do a bit of zigzagging here，” said Fledge. “Hold on tight.”
He began flying to and fro， getting higher at each turn. The air grew colder， and they heard the call of eagles far below them.
“I say， look back！ Look behind，” said Polly.
There they could see the whole valley of Narnia stretched out to where， just before the eastern horizon， there was a gleam of the sea. And now they were so high that they could see tiny.looking jagged mountains appearing beyond the northwest moors， and plains of what looked like sand far in the south.
“I wish we had someone to tell us what all those places are，” said Digory.
“I don’t suppose they‘re anywhere yet，” said Polly. “I mean， there’s no one there， and nothing happening. The world only began today.”