Sumbowa passed the note to the lawyer, who scrutinised the envelope critically.
"This envelope is addressed to Mr. Solomon," he said.
"Yes. The note was lying on his desk without an envelope, so I picked one out of the waste-paper basket and put the note in it."
"And this is the identical envelope which you picked up out of the waste-paper basket?"
"Yes."
"At the time you found the note?"
"Directly I had finished reading it."
"All of which circumstance took place a few hours before the Hawk left Singapore and during the time that Mr. Solomon was out of town?"
"Yes."
"Then," said the lawyer quietly, "how do you account for the fact that this envelope bears on it a postmark dated a week after the Arrow's departure?"