The four of them leaned back in their seats and kept quiet. The boys appeared exhausted from the ordeal. They thought that at last everything would be cleared up and now they discovered that it still remained a mystery. “At last,” muttered Jack, “we are back where we started. Hooray!” Paul sighed and kept silent. Ken asked sadly, “Now what are we going to do?”
His companions shrugged their shoulders. Mr. Wilson remarked, “I wish I knew how I could help you. But as a matter of fact, I am leaving on the midnight express.”
“That’s too bad,” said Paul. “I thought that perhaps you would stay here for several days.”
Mr. Wilson shook his head. “That is out of the question,” he answered.
“To come back to the point,” said Jack, “what do you think we ought to do, Paul?”
“About what?”
“The mystery of the white card, of course.”
“I suppose we will just have to wait and see. Perhaps we will find some clue one of these days which will solve it.”
“If we wait until the mystery is solved by itself, we will never know the solution,” was Ken’s statement.
“Too bad I can’t help you,” said Mr. Wilson as he rose to go.