The bar was...unusually reticent, in the lower layers of her mind (and she hadn't pried further; she wasn't sure if she'd be noticed; she wasn't sure if offending would get her kicked out, and regardless of whether it was actually safe it was safer than anywhere else she'd been for the past...three years?) so she couldn't be sure this place wasn't really a trap of some kind, but the higher layers gave a plausible explanation that didn't involve being a trap, and whatever else it was warm and dry and had food. Her guard was probably a full 25% down. Positively trusting, these days.
"Well, how were the other two kinds of magic created? No, wrong question, artifact creation would be a large number of interrelated things, possibly its own field of study, not a monolithic event. What can you tell me about how magical girls came to be?"
"It varies. For me, it lasted hours. One of the other children my teacher kidnapped only spent a few minutes at it."
Charlotte, who has started skimming the textbooks just fast enough to transcribe them into the tablet, winces slightly.
A moment after that, her magical girl magic presents her with a new spell.
"Ooh, new magical girl spell." Pause. "Annnnd I'm not sure I should cast it while in Milliways because this place has its own time-screwing-around-ness but the incantation is 'Possibility Vision'."
"Hey, Bar, do you know if your time-weirding would actually interfere with Bella's spell?"
"Shoulda been more specific, I meant Milliways time-weirding. Does it apply to the whole place including backyard and upstairs, as far as you know?"
"I kind of wanted to see, but oh well; the important part is that you can use it to seriously mess up some evil fluff."
"Dearheart, why don't you get some introductory sorcery books from Bar, and you can read them and compile a curriculum for Bella, and I can eavesdrop and transcribe what you're reading? That seems most efficient. And--perhaps we could get a room or something, having a large number of books spread out over the countertop seems unnecessarily obstructive."