Ernest Shackleton, looking for members of his proposed expedition to Antarctica, met Brocklehurst in London in 1906, and was impressed by his boxing achievements. Brocklehurst offered to contribute to the expedition funds. The appointment was confirmed in May 1907; he was Assistant Geologist. He travelled independently, paying for a first class passage to New Zealand, where he joined the other members of the expedition on the
Nimrod. After a base was established in Antarctica at
Cape Royds in February 1908, he was one of a party which climbed the volcano
Mount Erebus (unclimbed until then). The party of
Edgeworth David,
Douglas Mawson,
Alistair Mackay,
Eric Marshall, Brocklehurst and
Jameson Adams started on 5 March. Brocklehurst suffered from frostbitten feet, and was unable to complete the climb; the others reached the summit on 10 March. Afterwards, a big toe had to be amputated because of frostbite. He was not chosen for the polar party, but was part of the support party which accompanied them for part of the way. The four-man polar party, intending to reach the
South Pole, eventually reached a
Farthest South latitude of 88° 23' S, from the pole. Brocklehurst, as a member of the shore party of the expedition, was awarded the Silver
Polar Medal in 1909. ==After the Nimrod Expedition==