"Discovery" departed London on 31 July 1901, arriving at the Antarctic coast, via Cape Town and New Zealand, on 8 January 1902. After landing, Shackleton took part in an experimental balloon flight on 4 February. He also participated, with the scientists Edward Adrian Wilson and Hartley Ferrar, in the first sledging trip from the expedition's winter quarters in McMurdo Sound, a journey which established a safe route on to the Great Ice Barrier. During the Antarctic winter of 1902, in the confines of the iced-in "Discovery", Shackleton edited the expedition's magazine "The South Polar Times".