River opens her mouth, her brows drawn a little together with something like worry.

But whatever she was going to say is abruptly lost as her head snaps around, the moment before the shout, and for a moment her whole body is gathered to flee--

And then her shoulders drop and so do her eyes, and her heels draw together and her hands clasp, and it's a disheveled servant girl standing in front of Miss Mary Lennox, her head bowed.