On 7 March the two groups combined at around and all advanced towards the summit. On the following day a blizzard held them up, but early on 9 March the climb resumed; later that day the summit of the lower, main crater, was achieved. By this time Brocklehurst's feet were too frostbitten for him to continue, so he was left in camp while the others advanced to the active crater, which they reached after four hours. Several meteorological experiments were carried out and many rock samples were taken. Thereafter a rapid descent was made, mainly by sliding down successive snow-slopes. The party reached the Cape Royds hut "nearly dead", according to Eric Marshall, on 11 March.
