Suspicion then falls on a hunchbacked housemaid, on Rachel's cousin Franklin Blake, on a troupe of mysterious Indian jugglers, and on Rachel herself. The phlegmatic Sergeant Cuff is called in, and with the help of Betteredge, the Robinson Crusoe-reading loquacious steward, the mystery of the missing stone is ingeniously solved.

Introduction and Notes by David Blair, Rutherford College, University of Kent.