Dixie Costello has been the nemesis of Inspector Harry Martineau through lo! these many (this is Proctor's eighteenth) books. Martineau is so stolid a symbol of dogged police efficiency and Costello so much the organizationman-thief that Martineau's cases stalemated Just short of Costello and never allowed their enmity to reach Holmes/Moriarty heights. But this is the cast that counts--built around the hot handling of cool Jewels--forty pounds of industrial diamonds. An hour and forty minutes worth of expert detective entertainment.