Pelorus Sound (; officially Pelorus Sound / Te Hoiere) is the largest of the sounds which make up the Marlborough Sounds at the north of the South Island, New Zealand. The Marlborough Sounds is a system of drowned river valleys, which were formed after the last ice age around 10,000 years ago. Pelorus Sound has a main channel which winds south from Cook Strait for about , between steeply sloped wooded hills, until it reaches its head close to the Havelock township. Pelorus has several major arms, notably Tennyson Inlet, Tawhitinui Reach, Kenepuru Sound and the Crail/Clova/Beatrix Bay complex. Its shoreline runs for . Industry in Pelorus Sounds is based around marine farming, pine forestry and some tourism. Private holiday homes are becoming more common. Most of the settled places are hard to reach overland, and are serviced by the Pelorus Express, a mail boat which does three different weekly runs from Havelock. Maud Island, also called Te Hoiere in the Māori language, is a island in the Pelorus Sounds. It is an important nature reserve to which only scientists and conservationists have access. History The local iwi (tribe) of the indigenous people of New Zealand is the Ngāti Kuia. According to Ngāti Kuia oral tradition, their founding father, a descendant of Kupe, came to the South Island in his waka Te Hoiere. In 1642, Abel Tasman sailed past D'Urville Island. French and Russian explorers followed and in the 1770s Captain James Cook arrived. In 1838, Philip Chetwode in command of the , , carried out the first survey of Pelorus Sound. The sound was named in honour of this survey. A pelorus was a navigational instrument used on sailing ships. The instrument, in turn, was named after the pilot for Hannibal, circa 203 BC. In 1864, gold was discovered in the Wakamarina Valley and, for a brief time, Havelock became a boom town as several thousand prospectors flooded the area. In 1865, the first timber mill started at Mahikipawa, an upper arm of Pelorus Sound. More mills were established, and native timber was shipped around New Zealand and to Australia. By the start of the 20th century the timber camps had largely given way to dairy and sheep farms. In 1939 the last mill was closed. About 325 million feet of timber had been sawn over a period of sixty years, and only two small areas of native timber