[He did sleep, and that's what's more concerning, personally, to him. John's not going to mention as much to her. He just offers a smile.]

Not as much as I would've liked. Think it's time to admit I'm not as young as I used to be. Floor's not the most comfortable place. You sleep all right?

[John leads their way on the course Sherlock set them. He's mentally repeating the instructions in his head just to keep them straight. Kimler Road. Kimler Road. Jubilee Line to Kimler Road.]