“Unopened?” 

 “Unopened,” she repeated, softly. 

 “But how is it to be done?” Bellamy asked. “He must have arrived in London when you did last night. How is it they are not already at the Embassy?” 

 “The Ambassador was commanded to Cowes,” she explained. “He cannot be back until late to-night. No one else has a key to the treaty safe, and Von Behrling declined to give up the document to any one save the Ambassador himself.” 

 Bellamy nodded. 

 “What about Streuss?” 

 “Streuss and the others are all furious,” Louise said. “Yet, after all, Behrling has a certain measure of right on his side. His orders were to see with his own eyes this envelope deposited in the safe by the Ambassador himself.” 

 “He returns to-night!” Bellamy exclaimed quickly. 

 She nodded. 

 “Before he comes,” she declared, “I think that the document will be in your hands.” 

 “How is it to be done?” 

 “The report is written,” she explained, “on five pages of foolscap. They are contained in a long envelope, scaled with the Chancellor’s crest. Von Behrling, being one of the family, has the same crest. He has prepared another envelope, the same size and weight, and signed it with his seal. It is this which he will hand over to the Ambassador if he should return unexpectedly. The real one he has concealed.” 

 “Is he here?” Bellamy inquired. 

 “Thank Heavens, no!” she answered. “My dear David, what are you thinking of? He is not here and he dare not come here. You are to go to your rooms,” she added, glancing at the clock, “and between five and six o’clock this evening you will be rung up on the telephone. A rendezvous will be given you for later on to-night. You must take the money there and receive the packet. Von Behrling will be disguised and prepared for flight.” 

 Bellamy’s eyes glowed. 

 “You believe this?” he exclaimed. 

 “I believe it,” she replied. “He is going to do it. After he has seen you, he will make his way to Plymouth. I have promised—don’t look at me, 

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