A few years ago, I heard Michael Cathcart speak on ‘the myth of the inland sea’. It was one of the funniest takes on Australian history I have heard. He related how his initially confident search for statements of belief in an inland sea by early Australian colonists petered out in the face of lack of evidence. Certainly, the explorer Charles Sturt believed in an inland sea and in his divine mission to discover it, but by 1845 he knew better. Finding little other evidence of the inland sea as the impetus for exploration, Cathcart decided it must be a creation of historians from Ernest Giles in 1889 to Derek Parker in 2007, with the idea recycled uncritically from book to book. Cathcart intended his research to be an academic thesis in history. How hard it must have been to be his academic supervisor. Each session must have ended in laughter and a mounting sense of desperation. How could an increasing lack of evidence be turned to good thesis account?