and asked if he could arrange a meeting with the Crown Prince. During this period, Zelle apparently offered to share French secrets with Germany in exchange for money, though whether this was because of greed or an attempt to set up a meeting with Crown Prince Wilhelm remains unclear. In January 1917, Major Kalle transmitted radio messages to Berlin describing the helpful activities of a German spy code-named H-21, whose biography so closely matched Zelle's that it was obvious that Agent H-21 could only be Mata Hari. The Deuxième Bureau intercepted the messages and, from the information they contained, identified H-21 as Mata Hari. The messages were in a code that German intelligence knew had already been broken by the French, suggesting that the messages were contrived to have Zelle arrested by the French. General Walter Nicolai, the chief IC (intelligence officer) of the German Army, had grown very annoyed that Mata Hari had provided him with no intelligence worthy of the name, instead selling the Germans mere Paris gossip about the sex lives of French politicians and generals, and decided to terminate her employment by exposing her as a German spy to the French. Trial In December 1916, the Second Bureau of the French War Ministry let Mata Hari obtain the names of six Belgian agents. Five were suspected of submitting fake material and working for the Germans, while the sixth was suspected of being a double agent for Germany and France. Two weeks after Mata Hari had left Paris for a trip to Madrid, the Germans executed the double agent while the five others continued their operations. This development proved to the Second Bureau that Mata Hari had communicated the names of the six spies to the Germans. On 13 February 1917, Mata Hari was arrested in her room at the Hotel Elysée Palace on the Champs Elysées in Paris. She was tried on 24 July, accused of spying for Germany and consequently causing the deaths of at least 50,000 soldiers. Although the French and British intelligence suspected her of spying for Germany, neither could produce definite evidence against her. Zelle's principal interrogator, who grilled her relentlessly, was Captain Pierre Bouchardon; he was later to prosecute her at trial. Bouchardon established that much of the Mata Hari persona was invented. Far from being a Javanese princess, Zelle was Dutch, which he used as evidence of her dubious and