 Well, oddly enough, I've actually sailed in the northern part of the Barrier Reef using a chart that was prepared by Cook. I mean, it was still in use in the 1950s. His navigation was extraordinarily accurate. And while facing all the problems and the climatic dangers, he stuck to his last, and he continued to make all these detailed plottings. He encountered great difficulties, most appalling of which was that he was worried by the Barrier Reef, which nobody of course seen before. And suddenly found that actually he had done the worst thing possible of getting inside the reef, because he was now trapped. So getting out again to the safety of the open ocean was a huge problem to him, but of course he succeeded.