Fandor burst out laughing, and Juve rang off, angrily.
Once in the street, he stood a moment in doubt as to his next course. If Wulf was really taking a trip in the circular tube, he would be in process of going round and round Paris. How was it possible to overtake him?
Hailing a taxi, he explained to the chauffeur:
"Look here, I want you to take me to the Courcelles Station ... there we must find out in what direction the first train passes, either toward Porte Maillot or toward the Avenue de Clichy ..."
The man stared stupidly and Juve found it necessary to explain in a few words the quest he was setting out upon.
"If our man isn't on the first train that passes Courcelles, then we must hurry over to the Bois de Boulogne Station, understand?"
Juve had the luck to learn from the ticket seller at Courcelles that she had noticed Wulf, and that he had bought a first-class ticket; this limited the search very considerably.
The first train pulled in, but Wulf was not on board.
Juve sprang into his taxi and now hurried over to the Bois de Boulogne. Here the same result met him; the next station was Auteuil, then Vaugirard, la Glacière and Bel-Air.