Shackleton’s party was not as prepared as he had hoped. They had plenty of dogs, but the only experienced dog driver had dropped out at the last minute. Though their overland trek required an average of 15 miles a day, only one person on the entire crew knew how to ski. They sailed to Buenos Aries, in South America, bought some more supplies, and hired a few more people, including the photographer, James Hurley. They also had an unwelcome visitor onboard, a stowaway named Pierce Blackboro…