I did have — definitely — one heroic figure who impressed me very much indeed, and that was the great Antarctic explorer, Shackleton. Shackleton I always admired because he was a tough man and a very good leader. And whenever he was in difficult circumstances, which he frequently was, he seemed to have the great ability to inspire his men and lead his party safely out of those conditions. So certainly Shackleton, I would have said, more than anything, was a role model for me. And later on, when I was down in the Antarctic myself and doing various adventures, I really felt that I tried to behave perhaps a little bit more like Shackleton, than any of the other famous Antarctic explorers.