At the time that I made the acquaintance of Casimir the Grand Duke had been in Paris for three days, and he was--according to my informant--"like a raging lion." The charming dancer had vouchsafed no reply to his invitation and he had met with the same reception, on presenting himself in person, which had been accorded to myself and to those others who had sought to obtain an interview with Zara el-Khala! My state of mystification grew more and more profound. I studied the reports of my nine assistants. It appeared that the girl had been in Paris for a period of two months. She occupied a suite of rooms in which all her meals were served. Except the Hindu who drove the hired car, she had no servant. She never appeared in the public part of the hotel unless veiled, and then merely in order to pass out to the car or in from it on returning. She drove out every day. She had been followed, of course, but her proceedings were unexceptionable. Leaving the car at a point in the Bois De Boulogne, she would take a short walk, if the day was fine enough, never proceeding out of sight of the Hindu, who followed with the automobile, and would then drive back to her hotel. She never received visits and never met any one during these daily excursions. I turned to the report dealing with the Hindu. He had hired a room high up under the roof of an apartment house where foreign waiters and others had their abodes. He bought and cooked his own food, which apparently consisted solely of rice, lentils and fruit. He went every morning to the garage and attended to the car, called for his mistress, and having returned remained until evening in his own apartment. At night, after returning from the theatre, he sometimes went out, and my agent had failed to keep track of him on every occasion that he had attempted pursuit. I detached the man who was watching Casimir and whose excellent reports revealed the fact that Casimir was an honest fellow--as valets go--and instructed him to assist in tracing the movements of the Hindu. Two nights later they tracked him to a riverside cafe kept by a gigantic quadroon from Dominique and patronized by that type which forms a link between the lowest commercial and the criminal classes: itinerant vendors of Eastern rugs, street performers and Turkish cigarette makers. At last I began to have hopes. The Grand Duke at this time was speaking of leaving Paris, but as he had found temporary consolation in the smiles of a lady engaged at the "Folies" I did not anticipate that he would depart for several days at any rate. Also he was the kind of man who is stimulated by obstacles.