Detective stories are based upon the law of improbabilities. To achieve its purpose of shocking readers, every detective story must have, if not a new trick, at least a new combination of old ones. Author Fisher uses two old ones: reanimation and double dual identity. His readers may be able to control their jitters when someone who looks a great deal like poor old Frimbo suddenly enters the proceedings, alive, hearty and verbose. They will be amazed at what reappearing Frimbo has to say about death-rites in the African tribe of which he is king; at what he keeps in the bottles in his medicine chest: at who it was that tried to whack him on the head with a greasy human leg-bone.