On his return he said:

"Bien, m'sieur. We leave the Midi Station at midnight and arrive in Paris at half-past five. I will engage sleeping berths, and I will telephone to my friend, Inspector Dricot, at the Préfecture, to send an agent of the brigade mobile to meet us. Non d'un chien! What a surprise it will be for the fugitives. But," he added, "they are clever and elusive. Fancy, in order to go from Brussels to Paris they travel right away into Austria, and with through tickets to Belgrade, too! Yes, they know the routes on the Continent—the routes used by the international thieves, I mean. The Wels route by which they travelled, is one of them."

Then I left him, promising to meet him at the station ten minutes before midnight. I had told Edwards I would notify him by wire any change of address, therefore, on leaving the Préfecture of Police, I went to the Grand and from there sent a telegram to him at Scotland Yard, telling him that I should call at the office of the inspector of police at the East railway station in Paris at ten on the following morning—if he had anything to communicate.

All through that night we travelled on in the close, stuffy wagon-lit by way of Mons to Paris arriving with some three hours and a half to spare, which we idled in one of the all-night cafés near the station, having been met by a little ferret-eyed Frenchman, named Jappé, who had been one of Frémy's subordinates when he was in the French service.

Just before nine o'clock, after our café-au-lait in the buffet, we walked out upon the long arrival platform where the Orient Express from its long journey from Constantinople was due.

It was a quarter of an hour late, but at length the luggage porters began to assemble, and with bated breath I watched the train of dusty sleeping-cars slowly draw into the terminus.

In a moment Frémy and his colleague were all eyes, while I stood near the engine waiting the result of their quest.

But in five minutes the truth was plain. Frémy was in conversation with one of the brown-uniformed conductors, who told him that the three passengers we sought did join at Wels, but had left again at Munich on the previous evening!

My heart sank. Our quest was in vain. They had again eluded us!

"I will go to Munich," Frémy said at once. "I may find trace of them yet."