Ngaro signed the Treaty of Waitangi on 12 February 1840 at Mangungu, Hokianga.
The first speaker at the hui to support the treaty, he welcomed William Hobson as governor:
‘Welcome, welcome, welcome, Governor!’ cried Ngaro. ‘Here are the Missionaries; they come to the land, they bought and paid for it, else I would not have them. Come, Come! I will have the Governor. No one else perhaps will say “Yes,” but I, Ngaro, I will have him. That is all I say.’ [1]
[1] T. Lindsay Buick, The Treaty of Waitangi: or, how New Zealand became a British colony, Mackay, Wellington, 1914, p. 140