She had lain there an hour perhaps when she was startled from a slow reverie by a sharp cry which seemed to proceed from the adjoining room. She sat up in bed and listened, and in a minute it was repeated. It sounded exactly like the plaint of a weary child stopped summarily by the placing of a hand over its mouth. In the dark silence her bewilderment shaded gradually off into uneasiness. She waited for the cry to recur, but straining her ears she heard only the intense crowded stillness of three o'clock. She wondered where Knowleton slept, remembered that his bedroom was over in the other wing just beyond his mother's.