Everything is clean and neat and tidy. A few living rooms are visible along the hall. A half-open door just off the foyer leads down to a presumable basement, and a staircase near the far end of the hall leads up to the second and third floors. Sherlock heads down the hall and past the stairs to the kitchen.

If Bella is paying particular attention, she might notice the cameras. They're fairly unobtrusive, but there are a lot of them.