On arriving in McMurdo Sound on 29 January 1908, Nimrods progress southward to the Discovery base at Hut Point was blocked by frozen sea. Shackleton decided to wait a few days in the hope that the ice would break up. During this delay, second officer Aeneas Mackintosh suffered an accident that led to the loss of his right eye. After emergency surgery by Marshall and Mackay, he was forced to relinquish his shore party place and go back to New Zealand with Nimrod. He recovered sufficiently to return with the ship in the following season.
