Based on your reading of “across south georgia,” what do you think is shackleton’s central purpose in writing his memoir?

Look what may be helpful for you. The final stage in Sir Ernest Shackleton's struggle to reach civilization—and thus save the Endurancecrew—was the historic 26-mile crossing of South Georgia Island, which had never before been traversed.With Frank Worsley, Tom Crean, Tim McCarthy, Chippy McNeish and John Vincent, Shackleton had sailed more than 800 miles in the lifeboat, the James Caird, surviving 17 days in the world's stormiest seas. Departing from uninhabited Elephant Island, where they had no hope of rescue, their destination was a whaling station located on South Georgia Island. While the men found South Georgia, which was considered the proverbial "needle in the haystack," they were forced by thirst, a broken rudder and a leaking boat to land at King Haakon Bay, which was located on the uninhabited south side of the island. Realizing that the boat could not successfully circumnavigate the island, with its rocky coastline and rough waters, Shackleton formulated a desperate back-up plan: He, Worsley and Crean would traverse the mountains and glaciers of this island to reach Stromness whaling station. Hope, it is what you need. And by the way, if you are not sure who to write it all, you may address the professional writers from Prime Writing and get assisted there easily. 

The answer is exciting networking.