 The circumnavigation of the South Island was completed within two months.For the complete journey around both islands, relationships had been developed between Māori and the crew, the legacy of Tupaia recorded by Māori in oral histories in addition to thousands of specimens collected by the scientific expedition led by Joseph Banks and Cook mapping the complete coastline, making minor errors, such as calling Banks Peninsula an island.On 22 January 1770, Cook climbed Kaitapeha peak on Arapawa Island and saw the strait (which he named Cook Strait) separating North and South Islands.