She's saying so, to Sherlock.
And then instead of the ruins of flooded Europe she's in a featureless white room facing some grumpy person in a blue robe, wearing everything she was wearing, less her coin bandolier but including her crown, and something's wrong, her thoughts are slow and won't speed up, her memory's as slippery as it ever was before she met Stella, and how did she get here, why doesn't the brainphone work, where's Sherlock?
Where are her coins? Where's her magic? She can't teleport either, not even across the room - she bites her lip just a little and she can't even remember how moving pain left to right is a thing and it goes right on stinging without regenerating -
Where is she?
"...Because mind control? Because cultural taboo? Because the librarians all back each other up and several of them know martial arts? Because magical impossibility?"
"Okay." She closes her eyes. "What else don't I know that I'll need to find out to get along here? You're being so helpful - immensely helpful - and of course my natural response is to get as much information out of you as I can."
"Yeah, I couldn't otherwise get out of my home district safely. I stole a canoe and left a note telling my parents I was attempting to go someplace nobody could actually get to and actually walked to the next town and stowed away on a train."
"As soon as it was safe I told them I was alive," she says. "They were upset, but they're okay now. Or at least they are if my guess about why my apartment looks the way it does is correct."
"Sorry, I can't always tell the difference between people being interested in what I have to say and just being polite."
"Oh. I have a very small and very nicely decorated apartment. I think my girlfriend brought me back to life after I died and it worked, sort of, just - forked me, one there and one here, instead of getting me out of here. I'm going to check for her in the library directory, though, in case it's what the guide said it looked like, a suicide. But if I'm right my parents are never going to know that I died, because there'll be a live one of me, and I sure wouldn't tell them."