Later that year, Flinders returned and finished charting the islands in the Norfolk; he then went on to complete the first circumnavigation of Tasmania (1798–99), accompanied by George Bass, proving Tasmania to be an island separated from the Australian mainland by Bass Strait, later named in honor of George Bass.
Máis tarde ese ano, Flinders volveu e terminou cartografar as illas no "Norfolk", entón continuou a completar a primeira circunnavegación de Tasmania (1798-99), acompañado por George Bass, demostrando que Tasmania é unha illa separada do continente australiano por Bass Strait, máis tarde chamado así en honor de George Bass.