The first Europeans known to have reached New Zealand were the Dutch explorer Abel Janszoon Tasman and his crew in 1642. Māori killed several of the crew, and no more Europeans went to New Zealand until British explorer James Cook's voyage of 1768–71. Cook reached New Zealand in 1769 and mapped almost the entire coastline. Following Cook, New Zealand was visited by numerous European and North American whaling, sealing, exploring and trading ships. They traded European food and goods, especially metal tools and weapons, for Māori timber, food, artefacts and water. On occasion, Europeans and Māori traded goods for sex. Some early European arrivals integrated closely with the indigenous Māori people and became known as Pākehā Māori. James Belich characterises many of the very early European settlers as forerunners of a "crew culture" – as distinct from the majority of later European immigrants.