same year when the British Colonial Office issued the Proclamation of Governor Bourke stating that all unalienated land in the colony was vacant Crown Land, irrespective of whether it was occupied by traditional landowners. Its publication meant that from then, all people found occupying land without the authority of the government would be considered illegal trespassers. In 1836, Port Phillip was officially recognised as a district of New South Wales and opened for settlement. The main settlement of Melbourne was established in 1837 as a planned town on the instructions of Governor Bourke. Squatters and settlers from Van Diemen's Land and New South Wales soon arrived in large numbers, and by 1850 the district had a population of 75,000 Europeans, 2,000 Indigenous inhabitants and 5 million sheep. In 1851, the Port Phillip District separated from New South Wales as the colony of Victoria. Western Australia In 1826, the governor of New South Wales, Ralph Darling, sent a military garrison to King George Sound (the basis of the later town of Albany), to deter the French from establishing a settlement in Western Australia. In 1827, the head of the expedition, Major Edmund Lockyer, formally annexed the western third of the continent as a British colony. In 1829, the Swan River colony was established at the sites of modern Fremantle and Perth, becoming the first convict-free and privatised colony in Australia. However, much of the arable land was allocated to absentee owners and the development of the colony was hampered by poor soil, the dry climate, and a lack of capital and labour. By 1850 there were a little more than 5,000 settlers, half of them children. The colony accepted convicts from that year because of the acute shortage of labour. South Australia The Province of South Australia was established in 1836 as a privately financed settlement based on the theory of "systematic colonisation" developed by Edward Gibbon Wakefield. The intention was to found a free colony based on private investment at little cost to the British government. Power was divided between the Crown and a Board of Commissioners of Colonisation, responsible to about 300 shareholders. Settlement was to be controlled to promote a balance between land, capital and labour. Convict labour was banned in the hope of making the colony more attractive to "respectable" families and promote an even balance between male and female settlers. The city of Adelaide was to