"It beats me altogether," said Dulcie, shaking her head. "How did she manage to do it? How did she know? Who told her?"
"That's the puzzler," returned Deirdre. "Certainly not Phyllis, and I don't believe anybody else ever heard of those extra dodges. Gerda's only been a fortnight at the school, and says she's never been in Cornwall in her life before, so how could she know? Yet she did it all so pat."
"It's queer, to say the least of it."
"Do you know, Dulcie, I think there's something mysterious about Gerda. I've noticed it ever since she came. She seems all the time to be trying to hide something. She won't tell us a scrap about herself, and yet she's always asking questions."
"What's she up to then?"
"That's what I want to find out. It's evidently something she doesn't want people to know. She ought to be watched. I vote we keep an eye on her."
"I really believe we ought to."
"But mind, you mustn't let her suspect we notice anything. That would give the show away at once. Lie low's our motto."
"Right you are!" agreed Dulcie. "Mum's the word!"