Hi, not sure if this is the right place to mention this (I'm new here so apologies): but in the South! introduction it says:
"As the last section of this project we include a short original recording by Ernest Shackleton about the expedition."
His speech is actually about the earlier Nimrod 1907-1909 expedition where Shackleton attempted to be the first to reach the South Pole. It is very interesting to listen to, so I don't suggest omitting it, but South! is about the Imperial Trans-Antarctic expedition 1914–1917, so perhaps just the text sould be altered.
Here's the South! link:
https://librivox.org/south-by-ernest-shackleton/