I don't believe this. I've been walking around the same corridor for the last hour, and the only things I've found is this door and a room full of spare doors down the corridor. Seriously! Spare doors!
There was a faint whirring sound from the wall. Clara knelt down and cautiously lifted up the covering to a round hole that had appeared next to the door. Inside sat a plain black pen.
So I'm not the only one. Clara hesitated before writing more. she didn't even know who had written the previous message, how long ago it was written or even if the writer was still alive.
I went swimming and the TARDIS has been sending me in circles ever since. Does anyone know a way out? She guessed that since she hadn't seen anyone else around, and the Doctor hadn't mentioned anyone having gotten lost in the TARDIS that there had to be somewhere she could go.
Only then did she realise that the writing to the right of the message was a response.
Who are you?
Doctor? it's Charley. how can I get out?
Ah. I must not have met you yet. Not officially, anyway.
Well, that was helpful.
AN: If you don't know, Charley Pollard travelled with the eighth Doctor and met the sixth Doctor later. Congratulations to Big Finish for managing to make that work.
Thanks again to Lost in a Daze for suggesting something similar to this. R&R!