At the head of that gulf, admitting that a practicable and direct line of route can be opened to it, the country, and the sea adjacent, may soon require attention. By timely examination and good arrangement, a commodious place of embarkation may be established there, which might, by degrees, become an important town; where horses might be shipped and conveyed by a short passage to India, free from the hazards of Torres Straits. It would appear from the brief but intelligible description by Captain Flinders, that Wellesley Islands, or Sweer's Island, being both higher than the main land, might be connected with it, by some permanent work, and thus afford a good port for steamers, and shelter and anchorage for other ships. According to the interesting narrative of Captain Stokes, the temperature is remarkably low, and convict labour might there be very usefully employed upon such works. The head of the Gulf of Carpentaria, being that part of the Indian Ocean nearest to Sydney, has appeared of more importance to the colonists, since steam navigation became regular between England and the Indian archipelago. Then it became more desirable for the colonists to know the nature of the interior country between their capital and that northern coast. The interior has been found very open and accessible; the fine country at the head of the Victoria must soon be occupied, and thus divide the whole distance into two equal parts, each of these not much exceeding the distance between Sydney and Melbourne, in Australia Felix; between which places mail- carriages now run twice a week. Thus, while, by the extension of geographical research, the proper fields for colonization are laid open for selection, and prepared for timely arrangements on the part of the Imperial Government; the colonists of New South Wales have promoted the general interests of their fellow subjects at home, by the developement of the resources of the territory around them. He "who measured out the sea in the hollow of his hand, and weighed the earth in a balance," has determined, by the condition of these two elements, the situation of the Gulf, and that of the great break in the East Coast range--the one affording the nearest access to an important sea, the other the easy way to a rich interior land. I would, with deference to Him, "who led Israel like a flock," and me in safety through the Australian wilds, distinguish the two regions by timely descriptive names on the map I now lay before the public; Capricornia, to express the country under the tropics, from the parallel of 25 deg. South, where nature has set up her own land-marks, not to be disputed: Australindia, the country on the shores of the most southern part of the Indian archipelago; which two regions may be made conterminous according to natural limits, when such limits can be accurately ascertained. APPENDIX.