Farmer
you should try googleing Dieppe's Maps. Dieppe was a portugese map maker and there is conjecture his maps depict Australia.
The portugese were active in Timor and the Torres strait some 200 years prior to Cook.
as early as 1605, the Dutch vessel Duyfken made the first landfall on the Australian coast.
In 1616, Dirk Hartog in Eendracht came upon islands off the West Australian coast, the largest of which bears his name, and he nailed up a pewter plate to a post to record his visit here.
and more
The problem with early maps is that latitude was estimated by dead reckoning, estimating a ships speed by how fast it was proceeding through the water by means of a weighted rope thrown overboard. As you can imagine this lead to maps with gross errors. Additionally much the west coast of Australia tends towards inhospitable and desolate hardly inviting for early explorers to record.
Aboriginal occupation of Australia is reliably dated to 40-50,000 years ago and some will tell you far far earlier.
Quote:At the time of Aboriginal arrival in Australia, the dinosaurs were long dead but Australia had a range of very large and remarkable mammals. These big animals are usually referred to as "megafauna" . They included equivalents of giant rhino-like cows and giant sheep-like animals as well as very large animals resembling giant goannas, emus and kangaroos
http://www.whitehat.com.au/Australia/Animals/MegaFauna.asp
Quote:For a long time the figure of 38 000 years was the accepted figure for Australia. But then in 1995, the figure was pushed up to 60 000 based on findings from Kakadu in the Northern Territory. Then findings from the Jinmium monolith pushed the figure up to 75 000, then 116 000, followed by a dating of ochre samples from ancient art dating back to 176 000 years ago.
http://aboriginalrights.suite101.com/article.cfm/origin_of_aboriginal_occupation