It was not until we were dining together late the following night in the comfortable old König von Preussen, at Cassel, that Valentine revealed the truth to me.

“When I met the German at Vichy I was passing [Pg 62]as Countess de Bourbriac, and pretending that my husband was in Scotland. At first I avoided him,” she said. “But later on I was told, in confidence, that he was a spy in the service of the War Office in Berlin. Then I wrote to Count Bindo, and he advised me to pretend to reciprocate the fellow’s affections, and to keep a watchful eye for the main chance. I have done so—that’s all.”

“But what was this ‘main chance’?” I asked.

“Why, don’t you see, Ewart,” exclaimed the Count, who was standing by, smoking a cigarette. “The fact that he was in the Intelligence Department in Berlin, and that he had been suddenly appointed military attaché at Brussels, made it plain that he was carrying out some important secret-service work in Belgium. On making inquiries I heard that he was constantly travelling in the country, and, speaking French so well, he was passing himself off as a Belgian. Blythe, in the guise of an English tourist, met him in Boxtel two months ago, and satisfied himself as to the character of the task he had undertaken, a risky but most important one. Then we all agreed that, when completed, the secrets he had possessed himself of should become ours, for the Intelligence Department of either France or England would be certain to purchase them for almost any sum we liked to name, so important were they. About two months we waited for the unsuspecting Otto to