"...okay." She'll believe that, if it was a numbered doctor, but she'll still keep an eye on him and lead him to an entrance where he doesn't have to climb, because she'd really rather not responsible for him falling down the cliffs. That'd just make everyone ask questions. Even if he doesn't die (which with him being Numbered and all isn't that unlikely at all. Weirder things have happened).

"This way." And she'll lead him up the Greens and past the castle ruins. They'll be walking for a while.