Portuguese Got to Australia in 1522
Portuguese seafarer Christopher de Mendonca led a fleet of four ships into Botany Bay in 1522 [link to http://www.news.com.au/story/0,23599,21421880-2,00.html no longer works]. No one noticed before because the map was oriented wrong when it was copied.
This is a nice article from news.com.au.
That’s cool! Want to tie in the emergent chaos angle of Henry the Navigator using prizes and economics to motivate explorers, and the risks to their personal security? It’s chaos in opposition to someone telling an explorer “you go here,” or “you’re now the department of exploration and map-making.”
There’s some bits in the archives about secrecy of maps, too.
Adam