THE TRIBULATIONS OF the blue diamond were not over. Already famous through the murder of Baron d'Hautrec and the incidents at the Hôtel Drouot, it attained the height of its celebrity six months later. In the summer, the precious jewel which the Comtesse de Crozon had been at such pains to acquire was stolen. Let me sum up this curious case, marked by so many stirring, dramatic and exciting episodes, upon which I am at last permitted to throw some light. On the evening of the tenth of August, M. and Madame de Crozon's guests were gathered in the drawing-room of the magnificent château overlooking the Bay of Somme. There was a request for some music. The countess sat down to the piano, took off her rings, which included Baron d'Hautrec's, and laid them on a little table that stood beside