Not until February, 1904, was the _Discovery_ freed from the ice, and on 10th September she reached Spithead after an absence from England of over three years. In those years a crop of most useful information had been gathered, and many geographical discoveries had been made. Among the latter were King Edward Land, Ross Island, and the Victoria Mountains, and--most important of all--the great ice-cap on which the South Pole is situated.
Not for some years yet was the South Pole to reveal its secret, but Scott's first expedition may truthfully be said to have shown the way towards that revelation. In the years to come Amundsen frankly admitted how carefully he and his companions studied the accounts of Scott's and Shackleton's expeditions.
After Scott's return from his first visit to the Antarctic no further attempt was immediately made to visit the Far South. But that great explorer, Ernest Shackleton, had seen enough of the South to be gripped by the desire to solve more of its problems, and in the _Geographical Journal_ of March, 1907, he stated the programme of a proposed expedition. In this programme Shackleton said: "I do not intend to sacrifice the scientific utility of the expedition to a mere record-breaking journey, but say frankly, all the same, that one of my great efforts will be to reach the southern geographical Pole."
The financial difficulties that seemed to be inseparable from Polar expeditions followed, but they were ultimately removed, and on July 30, 1907, the _Nimrod_ sailed for New Zealand.
Bearing in mind the failure of the dogs in Scott's expedition, Shackleton decided to use Manchurian ponies as his principal means of traction. The utmost care was taken in preparing the equipment and in choosing the staff to accompany the expedition. Shackleton intended to land a shore party, and among this party were Frank Wild and Ernest Joyce (who had been with Scott), Douglas Mawson, Lieutenant J. B. Adams, Dr. E. Marshall, Raymond Priestley, and G. E. Marston.
Before leaving England, Shackleton decided, if possible, to establish his winter quarters on King Edward VII. Land in preference to Scott's old quarters at Hut Point in McMurdo Sound; but he was unable to carry out this plan, and ultimately he landed close to Cape Royds on the east coast of Ross Island. On February 22, 1908, his ship, the _Nimrod_, started upon her journey to New Zealand.