Port Phillip was occupied in 1836, Portland Bay in 1835, South Australia in December 1836. COMMUNICATION BETWEEN SOUTHERN AND WESTERN AUSTRALIA. The first step taken by the Overlanders was the connexion of Port Phillip with Sydney, and they thus, as it were, established a great base line from which their subsequent operations could be carried on; at this period they did not however bear the name of Overlanders, which was only given to them after Adelaide had been reached in 1838. EARLY ENTERPRISES OF THE OVERLANDERS. The Overlanders had hitherto been occupied in merely pushing their stock stations to different portions of the colony of New South Wales; but a new and fertile field for enterprise opened to them in the establishment of the colony of South Australia, which as before stated was in December 1836; and many an enterprising mind instantly turned thitherward with earnest longings which soon ripened into action. In November 1837, that is, in eleven months from the foundation of the new colony, several hardy adventurers had laid, matured, and commenced carrying into operation plans which some deemed insane when they heard of the amount of capital invested in so new an undertaking, but which were undertaken by the adventurers in full confidence in their own powers. THEIR FIRST EXPEDITIONS TO ADELAIDE, AND TO THE WESTWARD OF PORT LINCOLN. Two expeditions started almost at the same time for this new market. In February 1838 Mr. Hawdon moved from the Goulburn and Mr. Eyre from Port Phillip. In April 1838 Mr. Hawdon arrived in Adelaide and shortly afterwards was followed by Mr. Eyre, who had attempted to take a direct route from Port Phillip to Adelaide, but coming upon an impassable country he had been compelled to turn to the northward, and then to make it by the same route which Mr. Hawdon had pursued. Just eight years before this period a hardy party of explorers under Captain Sturt had first ventured in a whale-boat to descend a river traversing this unknown land. Rapidly had the fruits of this enterprise ripened to maturity; the river was now made a highway of commerce, a connecting link between two countries. In the remaining portion of 1838 and in 1839 the energies of the Overlanders were fully employed in supplying South Australia with stock; and during this period several new and shorter lines of route were struck out, the last great improvement of this kind being made by the adventurous C. Bonney, Esquire, who connected Port Phillip with Adelaide by a direct road running nearly parallel to the coast, so that the portion of the continent of Australia which lies between Moreton Bay and Adelaide is now connected by a passable route.