The Strange Countess by Edgar Wallace

It was three o'clock in the afternoon when Lois Reddle woke from a heavy sleep, feeling ravenously hungry. She got off the bed, and, putting on her shoes, walked to the window. The prospect was a dreary one. She saw the farmyard into which she had driven that morning, and recognised the slatternly woman who was feeding the chickens as the janitress who had opened the door. Beyond the discoloured wall was the slope of a treeless down, and, by getting close to the pane and looking sideways, she could see no more than a further fold of the hills, surmounted by a black copse.

She felt refreshed when she had bathed her face and hands, but the pangs of hunger had grown more poignant, and she went to the door and turned the handle. It did not budge; the door was locked. The window sash, she found, only opened a few inches, but it was sufficient to call to the woman in the yard, and presently she attracted her attention, for she waved her hand impatiently and went on feeding the chickens. Then, after a few minutes, she went out of the girl's line of vision. It was some time before her heavy tread sounded on the stairs, and obviously the locked door was no accident, for, when the woman came in carrying a tray, the key was hanging from a chain fastened to her waist.