The history of Australia from 1788 to 1850 covers the early British colonial period of Australia's history. This started with the arrival in 1788 of the First Fleet of British ships at Port Jackson on the lands of the Eora, and the establishment of the penal colony of New South Wales as part of the British Empire. It further covers the European scientific exploration of the continent and the establishment of the other Australian colonies that make up the modern states of Australia. After several years of privation, the penal colony gradually expanded and developed an economy based on farming, fishing, whaling, trade with incoming ships, and construction using convict labour. By 1820, however, British settlement was largely confined to a 100 kilometre radius around Sydney and to the central plain of Van Diemen's land. From 1816 penal transportation to Australia increased rapidly and the number of free settlers grew steadily. Van Diemen's Land became a separate colony in 1825, and free settlements were established at the Swan River Colony in Western Australia (1829), the Province of South Australia (1836), and in the Port Philip District (1836). The grazing of cattle and sheep expanded inland, leading to increasing conflict with Aboriginal people on their traditional lands. The growing population of free settlers, former convicts and Australian-born currency lads and lasses led to public demands for representative government. Penal transportation to New South Wales ended in 1840 and a semi-elected Legislative Council was established in 1842. In 1850 Britain granted Van Diemen's Land, South Australia and the newly-created colony of Victoria semi-representative Legislative Councils. British settlement led to a decline in the Aboriginal population and the disruption of their cultures due to introduced diseases, violent conflict and dispossession of their traditional lands. Aboriginal resistance to British encroachment on their land often led to reprisals from settlers including massacres of Aboriginal people. Many Aboriginal people, however, sought an accommodation with the settlers and established viable communities, often on small areas of their traditional lands, where many aspects of their cultures were maintained. Colonisation The decision to establish a colony in Australia was made by Thomas Townshend, 1st Viscount Sydney. This was taken for two reasons: the ending of transportation of criminals to North America following the American Revolution, as well as the need for a base in the Pacific to counter French expansion. Approximately 50,000 convicts are estimated to have been transported