At that moment Lucy， hot and breathless， rushed into theourtyard behind them. In a low voice she tried to make hem understand what she had overheard. And when they ad partly understood it even the bravest of them did not ok very happy.
“Invisible enemies，” muttered Caspian. “And cutting usff from the boat. This is an ugly furrow to plough.”
“You’ve no idea what sort of creatures they are， Lu？” asked dmund.
“How can I， Ed， when I couldn‘t see them？”
“Did they sound like humans from their footsteps？”
“I didn’t hear any noise of feet.only voices and this ightful thudding and thumping.like a mallet.”
“I wonder，” said Reepicheep， “do they become visiblehen you drive a sword into them？”
“It looks as if we shall find out，” said Caspian. “But let‘s get out of this gateway. There’s one of these gentry at that pump listening to all we say.”
They came out and went back on to the path where the trees might possibly make them less conspicuous. “Not that it‘s any good really，” said Eustace， “trying to hide from people you can’t see. They may be all round us.”