That was a bit of a bait-and-switch: there's essentially no information about pre-modern Māori or Polynesian journeys to Antarctica.<p>I've found the open-source text of the fragment of the oral story that was mentioned (recorded by a British historian in 1899). The fragment excerpted is in Ch. 7 of the wikisource version.
Note that Wikipedia strongly warns that this historian is an unreliable source.<p><a href="https://en.wikisource.org/wiki/Hawaiki_The_Original_Home_of_the_Maori" rel="nofollow">https://en.wikisource.org/wiki/Hawaiki_The_Original_Home_of_...</a><p><a href="https://en.wikipedia.org/wiki/Percy_Smith_(ethnologist)" rel="nofollow">https://en.wikipedia.org/wiki/Percy_Smith_(ethnologist)</a><p>(<i>"...he was more uncritical and framed hypotheses on what now seems slender linguistic and traditional evidence"; "...it is now generally accepted that much of his work on the Maori is unreliable"</i>)