HISTORIC MANGONUI – Far North of New Zealand Posted on June 13, 2018 by Werner Dekarski HISTORIC MANGONUI: Mill Bay MILL BAY Originally Mill Bay was called Hudson Bay. It was renamed after a large mill was built in 1880. HISTORIC MANGONUI: Mill Bay MILL BAY This garden was developed in 2004 by local volunteers in recognition of Mabel Thorburn, who lived in the nearby old cottage.