Sue a Little Heroine by L.T. Meade

Mrs. Warren and Agnes talked together for quite three quarters of an hour. When they came out of the bedroom, Mrs. Warren was wearing a tight-fitting cloth jacket, which made her look more enormous even than the cloak had done. She had a small black bonnet on her head, over which she had drawn a spotted net veil. Her hands were encased in decent black gloves, her skirt was short, and her boots tidy. She carried in her hand a fair-sized brown leather bag; and telling Connie that she was "goin' out," and would be back when she saw her and not before, left the two girls alone in the little sitting-room.

After she had shut the door behind her, Agnes went over to it, and possessing herself of the key, slipped it into her pocket. Then she stared hard at Connie.