He'd always known where pretty much everything was in his own. He'd made a point of knowing where most everything was in his own's Doctor's. Carefully not organizing most of the choatic piles of junk in various places, but having a general idea what was in each room.
A thought occured to him. "You know what. Let me take the lead, I'm pretty sure, if your TARDIS really is a duplicate of the one I know, I know where a room is with a bed." He got his bearings and headed to the left.