In the first half an hour , the ruler - edged lines of swell pouring into the bay had had a distinctly southern origin .
They 'd wrapped perfectly around the jagged headland and zipped along the reef in mindless , mechanical precision .
In the first half an hour , the ruler - edged lines of swell pouring into the bay had had a distinctly southern origin , so they 'd wrapped perfectly around the jagged headland and zipped along the reef in mindless , mechanical precision .