"Even if we don't find water, we can make do with coconuts. And, if nothing else, circlin' the beach will give us an idea of how big this island is. We just need to leave somethin' to show that we been here, so that we know when we've made it back." Reaching into her back pocket, Barbara pulled out a bright red bandana, and looked around for sizeable piece of driftwood. Finding a large enough piece to be secure, she tied the square cloth to one end, and planted the other deep into the sand. "There, that should do the trick."