In reply to pneame:
I read a lot about the explorers during my backpacking days. Shackleton by Roland Huntford is an epic book and a completely enthralling read, Frank Hurley's photos in Shackleton and Endurance are superb. It shows a measure of the man that his crew would do anything he asked as he was held in such high regard. Frank Worsley's navigation to South Georgia must be one of the greatest feats in maritime history, he only made 4 sextant readings in 800 nautical miles.
Everyone remembers the epic Endurance escape, but his 2 previous expeditions had their own stories. Shackleton making the decision to turn back when he was just over 100 miles from the south pole due to lack of supplies, also Amundsen said that if it wasn't for Shackleton's mapping of the terrain he would never have made it to the South Pole.
Chris