The unexpected sound of the doorbell makes her jump. She was falling into the muddled sleep of those who haven’t rested in a while.

Her hand was laying lightly on the baby’s stomach, and the satisfied, deep breathing of the little girl had made up for the odd angle it was at, her wrist resting on the edge of the Moses basket.

Inspector Yao pushed his glasses back to the top of his nose, adjusted his suit jacket, blinked and looked again. He could have sworn he saw a girl standing beneath the archway, but it was two o’clock, and the students would not be permitted to leave for another hour and a half at least.

She certainly wasn’t there now.