Pre-Tasman Portuguese Down Under ?

Book excerpt: For more than 200 years, scholars and amateurs alike have wrestled with the problem -- did sixteenth century Portuguese navigators sail down the east coast of Australia and along the shores of New Zealand, charting the coastlines as they went? Employing endless speculation, all kinds of people have proposed all kinds of theories, not one of which resulted in a resolution over those two centuries. This book is different. Forsaking the speculation and guesswork model, it finally lays the matter to rest beyond all reasonable doubt