But Sister Lake was not to be placated. If Miss Riley were well enough to do Mrs. Sands' errands by day and night, a nurse's services were no longer needed. Sister Lake considered herself well paid, and would accept no present in addition. The butler was summoned to call a taxi and attend to sending down the small luggage. Meantime the Queen's pearls were forgotten. XIV THE STONE COPING This was bad luck! Clo had not expected O'Reilly to track her down so soon. But he was at the door. There was only that frail barrier of wood, and the space of a few seconds between them! He had discovered the loss of his door key, and doubtless the other loss as well. He had guessed who was the thief, and what was the thief's motive. He had hurried home. A moment more--just the little delay of fitting in a pass key--and he would catch the culprit red-handed; he would deprive her of the spoils! Clear as a "cut in" from some moving picture, a scene rose before Clodagh's eyes. She saw herself at grips with O'Reilly. She saw him wrench the envelope from her hands as she resisted. She saw herself sobbing over her failure and Angel's lost hopes. That picture mustn't come true! The key attached to the watch-chain, she had removed from the safe door, and had laid watch and all on a buffet. Beside them she had placed the door key. Now, as the chambermaid chattered in the corridor, and O'Reilly made light of his loss, Clodagh moved faster than any figure in a moving picture. She snatched up everything on the buffet, pushed all into the safe, softly shut the steel door, concealed it with the panel which slipped readily into its groove, and fled into the adjoining bedroom. Lights from across a court showed that the sole doors were those of a bath and a clothes-closet. There was no way out from the bedroom. Entrance and exit to the suite were to be had only through the sitting room. "I might have known," Clo reflected. Too late she recalled that through the nearest door had appeared the couple in evening dress. She was caught like a mouse in a trap (poor mouse, who had meant to gnaw the encircling net!) caught unless--unless! Her heart gave a leap as she saw the one way out. The night was warm, and the window had been opened wide to let in the blue dusk. Light from opposite windows giving on the court shone upon a stone coping. It was broad, as copings go, broad enough for some white roses dropped from a window above to lodge without falling farther. It was this conspicuous splash of white on the dark stone which put into Clo's mind the word "unless."