There are no tortoises in New Zealand.
Rutherford did not return to New Zealand, and nothing more was heard of him. On December 5th, 1828, "The Australian," which 'was published in Sydney, stated that a man named Rutherford, who had been tattooed by the Maoris, and naturalized by them, was then in London, practising the trade of a pickpocket, in the character of a New Zealand chief, but that was before he supplied his story for "The New Zealanders."
Omai was an islander, who was taken to England, where he was lionized, and was afterwards taken back to the islands during Cook's last voyage.