The Twin Ring Mystery

Gail Carrington and Bob Bartley fear that their new friend Joan Bernell will find her stay at Crystal Beach to be dull, but their friend takes a lively interest in everything and is intrigued with an old locket that is to be offered as a prize in an upcoming swimming competition. Joan finds a secret compartment in the locket which contains a strange silver ring. Joan learns that the ring is half of a twin ring, two rings that were once joined together. The twin rings were probably separated and exchanged by an engaged couple, to be rejoined and worn by the bride after the wedding. Joan and her friends wonder how the ring became separated from its mate. The friends translate an inscription on the ring and read a diary which was found with the ring. Through their efforts, the friends reunite a man and woman who were separated from each other after the woman was believed drowned in a shipwreck.