When the southern winter ended .
Sledging activity became possible , Borchgrevink 's assumptions about an easy route to the interior were shattered ; the glaciated mountain ranges adjoining Cape Adare precluded any travel inland , restricting exploration to the immediate area around the cape .
When the southern winter ended and sledging activity became possible , Borchgrevink 's assumptions about an easy route to the interior were shattered ; the glaciated mountain ranges adjoining Cape Adare precluded any travel inland , restricting exploration to the immediate area around the cape .