There was a pause and the Tardis landed with a soft thud, like she was listening too to the sad story and didn’t want to intrude.
Clara looked the Doctor with a sad expression:
“Why is she a ghost now?”
“Because her work was never finished, and she can’t rest in peace as long as the painting is not complete in all its beauty”
“And do you believe it? I mean, the story is beautiful, but do you really believe there is an actual ghost in the Castle?”
“I don’t know. But one thing is certain: I aimed for the Tardis to land inside the Castle, and we are instead on a nearby hill. Look at the readings: there’s a forcefield surrounding the main structure that is preventing us from materializing inside it. Perhaps it is the ghost… perhaps it’s not”
He looked at her grinning
“Care to take a look?”
and with that he grabbed her hand, like his old self was so used to do all the time, and run for the door.