“Yes, I know. All I want you to do is to find out who visits Mr. De Gex, and whether any telegrams are sent by either him or Mr. Suzor.”

“I quite understand, señor,” was the detective’s reply as he rose, and a few minutes later withdrew.

Late in the evening two days afterwards I returned to the hotel to find the man Pardo awaiting me. After I had taken him up to my room and closed the door, he drew a piece of paper from his pocket, saying in French:

“Señor Suzor sent a telegram at half-past eight this evening of which this is a copy.”

The message he handed me was in a pencilled scribble, and was in English as follows:

“Charles Rabel, Rue de Lalande 163, Montauban.—

“Important that I should see you. Meet me at Hôtel Luxembourg, Nîmes, without fail, next Monday at noon.—O.”

The initial “O” stood for Oswald—Oswald De Gex! So the mystery-man of Europe contemplated leaving Madrid!

I thanked the man Pardo, who said:

“Señor Suzor did not dispatch the telegram from the chief office in the Calle del Correo, but from the branch office in the Plaza del Progreso. He apparently wished to send it in secret.”