sentences:  Trickett claims that the Portuguese were the first Europeans to discover Australia, between 1519–23, well before the first recognised landfall of Europeans in Australia in 1606 by Willem Janszoon.According to Trickett, a 1520 expedition searching for gold and led by Diogo Pacheco (a relative of Duarte Pacheco), may have been the first Europeans to sight Australia, in the present-day Kimberley region of Western Australia.Using an account from João de Barros's "Décadas da Ásia", a 1786 history of the Portuguese empire in Asia, Trickett argues Pacheco was killed at Napier Broome Bay, in a battle with Aborigines.