Our success may be attributed, as Flinders says, to the clayey consistence of the stratum immediately under the sand, and to the gravelly rock upon which that stratum rests; the one preventing the evaporation of the rains, and the other obstructing their further infiltration. INVESTIGATOR ROAD. This was a very important discovery, as Investigator Road is the only anchorage for vessels of all sizes at the head of the Gulf in either monsoon, and possesses an equal supply of wood, fish, and birds, with turtle close at hand on Bountiful Islands. Moreover, should an expedition be formed for the purpose of exploring the interior from the head of the Gulf, it is, as Flinders remarks, "particularly well adapted for a ship during the absence of the travellers." In addition to this, it is a point at which an expedition would first arrive to arrange plans for the future; and lastly, I should observe that in case of our being fortunate enough to find rivers or fertile country on the southern shores of the Gulf, we at once saw that we might look forward to the time when Investigator Road* should be the port from which all the produce of the neighbouring parts of the continent must be shipped, and when it should bear on its shores the habitations of civilized man, and the heavenward pointing spires of the Christian Church. The feeling that we might be the means of bringing about this happy state of things by discovering a country habitable by Europeans, greatly added to the zest with which we prosecuted our subsequent researches. (*Footnote. This road fully deserves the name of a good port, being four miles in length by one in breadth, with a depth of from 4 to 6 fathoms, and sheltered at all points except from south to South-South-East, in which direction the shoalness of the water prevents any sea from getting up.) SURVEY THE ANCHORAGE. On duly weighing these considerations in my mind I determined to make an accurate survey of this anchorage, including Sweers and the eastern portion of Bentinck Island; and to despatch two boats to examine the group of islands to the north-west, and the mainland from thence to abreast of the south-west end of Bentinck Island. On the morning of the 9th, accordingly, Messrs. Forsyth and Parker proceeded with the whaleboats on this service. Near Point Inscription, I found a native skull on the shore, with forearm, left tibia, and a portion of the inferior maxillary. They must have been exposed some time, as they were very nearly destroyed by the action of the air. How they could have come in this situation was a mystery, as there was nothing indicating a place of burial. On the eastern Point of Bentinck Island a number of rafts were seen, which suggested the name of Raft Point. We also on one occasion perceived some natives at a distance.