the Germans false information about British military movements. If he chose not to work for Britain, he would be offered the position of Air Force instructor. Grosjean agreed to act as a double agent for the Security Service (MI5); he was given the code name FIDO and became one of 40 Double-Cross agents, a group which included Joan Pujol Garcia, Nathalie Sergueiew, Arthur Owens, Roman Czerniawski, Elvira Chaudoir, and Duško Popov. Grosjean then joined the Free French Air Force, obtaining a position through pre-arrangement by MI5. He was promoted to Lieutenant and given a position in the intelligence service. With the knowledge of MI5, but not the French, he was also writing coded letters to his handler in Barcelona. In January 1944, he was given permission to fly again. By March, the Germans had become aware that he was working for the British and he wrote that he was "condemned to death". Both his British and French colleagues no longer trusted him. His handler wrote that it was "necessary to ensure that he got no access to operational information of any kind and that he was as far away from the zone of operations as possible." He was then posted to North Africa--first Algiers and then Meknes, where he worked as an instructor on P-39s. In case he fell into German hands, he was given the name François Perrin. He was then sent to the Lille Air Base, then to Paris to work at the Air Ministry. In late 1946, Grosjean completed his military career as a Captain in the Air Force Reserves. The French government awarded him the Croix de Guerre and the Legion of Honour. He was also one of a few to receive the Commemorative medal for voluntary service in Free France, and a hand-written note from General Charles de Gaulle reading: "You answered France's call when it was mortally wounded by joining the Free French Forces. You were part of the volunteers-our brave companions-who maintained our country in the war with honor. You were among the first men to lead us to victory. Now that our aim has been achieved, I wish to thank you cordially and simply in the name of France. C. de Gaulle." Archaeological career After a transition period, during which he trained as an archeologist and took part in digs with L'Abbé Henri Breuil, the famous French archeologist, he joined the French