03/06/2026
For those interested in the possibility of a Portuguese ‘discovery’ of Australia, the story of the carrack ‘Sao Paulo’ is noteworthy. This merchant ship was built in 1554 in Cochin, India and became a regular on the Lisbon (Portugal)-India run. Then, in 1558, it was deployed on an experimental route from the Portuguese colony of Brazil to Sumatra without the aid of charts or sailing instructions, mapping the tiny uninhabited volcanic island of Ile Saint-Paul on the way. It lies roughly 3,000km from the nearest continents of Africa and Australia and would become a crucial marker for later vessels riding the ‘Roaring Forties’ to the East Indies. In 1561, on its second voyage to what is now Indonesia, the ‘Sao Paulo’ was wrecked near Sumatra, the harrowing ordeal being chronicled in the Portuguese anthology of maritime disasters known as the Historia Tragico-Maritima. And here is the conundrum. The voyages of the ‘Sao Paulo’ are very well documented, but the Portuguese ships that supposedly mapped northern and eastern Australia as evidenced in the Dieppe maps, in particular the Jean Rotz’s 1542 Mappa Mandi, are completely unknown.