The expedition's other main accomplishments included the first ascent of Mount Erebus, and the discovery of the approximate location of the South Magnetic Pole, reached on 16 January 1909, by Edgeworth David, Douglas Mawson, and Alistair Mackay. Shackleton returned to the United Kingdom as a hero, and soon afterwards published his expedition account, "Heart of the Antarctic". Emily Shackleton later recorded: "The only comment he made to me about not reaching the Pole was 'a live donkey is better than a dead lion, isn't it?' and I said 'Yes darling, as far as I am concerned'".