But before she could speak, they both heard/felt it. Tha-thum. Tha-thum. Tha-thum! Missy's face changed, and she said quickly, "You have to go back. Now. It can cross over too, Diana, don't forget that. And a medium's mind can be the most vulnerable of all. If it finds you—" "Missy, I don't understand." "You will." Missy reached out and took Diana's hand, her small one surprisingly warm rather than cold. "Don't forget the green door. But go back now. Reach for Quentin." Diana wasn't sure she could, because her mind felt sluggish and cold, and doing anything at all required too much effort of her. But the warmth of Missy's small hand seemed to chase away part of the chill... Tha-thum! Tha-thum! She could feel the floor underneath her vibrate, as though under the steps of something immeasurably heavy, and the grayness around her seemed to be darkening, shading toward black.
