In Milliways, the front door opens.
Valar grow up slow, but thanks to you we've now got hundreds of them acquitting themselves well as well.
Tireh takes an obscene amount of time to decompress and recuperate - two whole weeks - and then she starts learning geometry, and cladistics, and etymology, and the Maitimos' name chart, and stuff like that, and makes several copies.
The team going through Bar's resources looking for worlds gives her a destination, and she tucks a claw into the pages of her books and goes.
"Hello," she sings, "I'm from another world and I'm here to help. Can you point me at someone who'd be a good representative of this one?"