Wethermill looked up drearily like one who has lost heart.
"Yes, you must not neglect that clue," he said.
Hanaud replied testily: "It is not a clue.

M.Ricardo tells that he travelled from Geneva into France and that his car was searched.

Well, we know already that the officers are particular at the Custom Houses of France.

But travelling from France into Switzerland is a very different affair.

In Switzerland, hardly a glance, hardly a word." That was true.