As Swan River had been very minutely examined in Baudin's voyage by MM. Heirisson and Baily, the former an enseigne de vaisseau, the latter a mineralogist, an account of which is fully detailed in De Freycinet's and Peron's respective accounts of that voyage,* without their finding anything of sufficient importance to induce me to risk leaving the brig at anchor off Rottnest Island for so long a time as it would necessarily take to add to the knowledge of it that we already possess, I did not think it advisable to delay for such a purpose, and therefore as soon as we were underweigh steered for the mainland and continued to run northerly along the shore at the distance of six miles from it. At noon our latitude was 31 degrees 37 minutes 32 seconds. The coast is formed by sandy hillocks, or dunes, of from one hundred to one hundred and fifty feet high, here and there sprinkled with shrubs, but in many parts quite bare: behind this frontier a second range of hills was occasionally seen on which the trees appeared to be of moderate size: the shore is rocky for two miles off and in many parts the sea broke. At half-past three o'clock we were abreast of a low, sandy projection, supposed to be Captain Baudin's Cape Leschenault. The appearance of the coast to the northward on this cape differed from what we passed in the morning, in that the coast hillocks are more bare of vegetation; there appeared to be several ridges behind the coast dunes, but they were all equally unproductive of vegetation. Lancelin Island was not distinctly made out but the two small rocky lumps on the bare sandhills that M. De Freycinet mentions, were seen and thought to be very remarkable. At seven o'clock, having reached in my plan the latitude 31 degrees 0 minutes 30 seconds, and longitude 115 degrees 0 minutes 0 seconds, we hauled off shore for the night. January 16.