A French map shows that the Portuguese were the first Europeans to discover Australia in the early 1520s, almost 250 years before Captain Cook claimed them for Britain. "'The Vallard cartographer has put these individual charts together like a jigsaw puzzle. Without clear compass markings its possible to join the southern chart in two different ways. My theory is it had been wrongly joined.' Using a computer Trickett rotated the southern part of the Vallard map 90 degrees to produce a map which accurately depicts Australia's east coast."
