No river of considerable importance had been found.

Students of geography could hardly conceive that there should be so large an area of land lacking outlets to the sea; and as none had been found in the parts investigated so far, it was believed that the exploration of the south coast would reveal large streams flowing from the interior.

Some had speculated that within the country there was a great inland sea, and if so there would probably be rivers flowing from it to the ocean.
A third main subject for elucidation when Flinders entered upon this work, was whether the country known as Van Diemen's Land was part of the continent, or was divided from it by a strait not yet discovered.

Captain Cook entertained the opinion that a strait existed.

On his voyage in the Endeavour in 1770, he was "doubtful whether they are one land or no." But when near the north-eastern corner of Van Diemen's Land, he had been twenty months at sea, and his supplies had become depleted.