Chapters 13 - 15 Summary

Dylan and Casey, thoroughly spooked by their encounter with the mystery shark, decide to swim at the crack where it will be safe and secluded. They're having a nice peaceful swim and—sploop! A rock lands in the water near them. Of course it is Louie, pitching rocks from above, not at them, but merely near them, to give them a scare. More harassment and squabbling follows as the boys square off. Then Dylan spots a man on horseback, high up on the cliff, and behind the man another man leading a packhorse.

"Paniolos?" Casey ventures. (Paniolo: Hawaiian cowboy.) But there aren't any cows around here, Dylan counters. The riders approach, and the boys meet the lead rider, Masa, an affable man of fifty whose skin has been weathered by a lifetime spent outdoors. He explains to the boys that...