Thankfully for her efforts, he was concentrated on the environment around them. He pointed with his cane.

"This way, I should think. And you can begin by telling me everything you know about this place, hmm?"

And he was off again, a certain subtle spring in his step. Old he may look, and old in this body he may be - but the Doctor was always the Doctor.

Just more or less crotchety depending on incarnation.