te 1838 and, despite being under orders from the Select Committee on South Australia in Britain not to undertake any public works, promptly oversaw construction of a governor's house, the Adelaide Gaol, police barracks, a hospital, a customs house and a wharf at Port Adelaide. In addition, houses for public officials and missionaries, and outstations for police and surveyors were also constructed during Gawler's governorship. Adelaide had also become economically self-sufficient during this period, but at heavy cost: as a result of Gawler's public works the colony was heavily in debt and relied on bail-outs from London to stay afloat. Gawler was recalled and replaced by Governor Grey in 1841. Grey slashed public expenditure against heavy opposition, although its impact was negligible at this point: silver was discovered in Glen Osmond that year, agriculture was well underway, and other mines sprung up all over the state, aiding Adelaide's commercial development. The city exported meat, wool, wine, fruit and wheat by the time Grey left in 1845, contrasting with a low point in 1842 when one-third of Adelaide houses were abandoned.
Trade links with the rest of the Australian states were established with the Murray River being successfully navigated in 1853 by Francis Cadell, an Adelaide resident. South Australia became a self-governing colony in 1856 with the ratification of a new constitution by the British parliament. Secret ballots were introduced, and a bicameral parliament was elected on 9 March 1857, by which time 109,917 people lived in the province.
In 1860 the Thorndon Park reservoir was opened, finally providing an alternative water source to the now turbid River Torrens. In 1867 gas street lighting was implemented, the University of Adelaide was founded in 1874, the South Australian Art Gallery opened in 1881 and the Happy Valley Reservoir opened in 1896. In the 1890s Australia was affected by a severe economic depression, ending a hectic era
