At the begining the four Alden children go to ragged cove,Massachusetts so there grand father could do bissnus and inding up getting on a wale watching boat. There was a storm the night befor. When everyone was on the boat the heded to howling clifs were the Fling Cloud crashed. Benny was climbing the rockes and found an old post box. a post box is somthing the sailors used to hide mesages,toys and carvings in them for other people.so captin bob helped him get the box out of the nud and rocks.inside there were carvings, spoon and a tube. the tube had old pappers and captin coffens personal diary.the children took the things to the flying cloud museum when the disscoverd the book was missing.the next day in the papapper there was a report that the museum had ben robed.it turned out that captin bob took the book to read it him self.Mrs.Coffin reporded the robery cause her books she rote was not true based on her family storys passed down from generations. Captin bob returned the diary to Mrs coffen and she will righa another book.