The_Complete_Chronicles_of_Narnia_(volumes_1-7,_in_order_of_publication)

"I don't see all your weapons," said Reepicheep. "Are they invisible too?" The words
were scarcely out of his mouth before they heard a whizzing sound and next moment a
spear had stuck, quivering, in one of the trees behind them.
"That's a spear, that is," said the Chief Voice.
"That it is, Chief, that it is," said the others. "You couldn't have put it better."
"And it came from my hand," the Chief Voice continued. "They get visible when they
leave us."
"But why do you want me to do this?" asked Lucy.
"Why can't one of your own people? Haven't you got any girls?"
"We dursen't, we dursen't," said all the Voices. "We're not going upstairs again."
"In other words," said Caspian, "you are asking this lady to face some danger which you
daren't ask your own sisters and daughters to face!"
"That's right, that's right," said all the Voices cheerfully. "You couldn't have said it better.
Eh, you've had some education, you have. Anyone can see that."
"Well, of all the outrageous - " began Edmund, but Lucy interrupted.
"Would I have to go upstairs at night, or would it do in daylight?"
"Oh, daylight, daylight, to be sure," said the Chief Voice. "Not at night. No one's asking
you to do that. Go upstairs in the dark? Ugh."
"All right, then, I'll do it," said Lucy. "No," she said, turning to the others, "don't try to
stop me. Can't you see it's no use? There are dozens of them there. We can't fight them.
And the other way there is a chance."
"But a magician!" said Caspian.
"I know," said Lucy. "But he mayn't be as bad as they make out. Don't you get the idea
that these people are not very brave?"
"They're certainly not very clever," said Eustace.
"Look here, Lu," said Edmund. "We really can't let you do a thing like this. Ask Reep,
I'm sure he'll say just the same."
"But it's to save my own life as well as yours," said Lucy. "I don't want to be cut to bits
with invisible swords any more than anyone else."