The group entered the office. Rather like a movie, the swivel chair... uh... swiveled to face them as they entered. 

"Good afternoon, children. You must be Jacob. And, of course, Jane." said the woman in the chair.

"How-" started Emma

"My name is Headmistress Peregrine."

I'm extremely lazy, so let's skip to... here.

"Was our grandfather like us?" Jane asked.

"Not entirely." Miss Peregrine replied, rising.

"What are 'Twin abilities?' What's a hollow?" asked Jane suddenly, "What are you talking about?!" 

Miss Peregrine froze.

"I-i thought you said something... never mind. This happens to me an awful lot."

"What happens?"

"I hear a sentence said by someone, but then it turns out they didn't say anything."

"That must be... your peculiarity." said Miss Peregrine finally.

"Her what the what?"

"Peculiarity."

"And what is that?" Jane asked. Miss Peregrine turned to her.

"The ability... to read minds."