"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?"