A wave of her wand, and locks click back, a door swings open, and she's in Grimmauld Place again.

Her usual nemesis lies grotesque and empty by the foot of the stairs, and for once her eye hits it before her toes do.

The house shifts noiselessly around her, a palpable, almost living presence, the emptiness amplifying its latent malevolence.

Tonks shivers. Her gaze travels over the dark entrance hall, the crooked stairs with their grotesque line of guards.

She realizes that what she came to find here is already gone.

There is no trace of Sirius in this house.