The Victorian gold rush was a period in the history of Victoria, Australia, approximately between 1851 and the late 1860s. It led to a period of extreme prosperity for the Australian colony, and an influx of population growth and financial capital for Melbourne, which was dubbed "Marvellous Melbourne" as a result of the procurement of wealth. The Victorian Gold Discovery Committee wrote in 1854: The discovery of the Victorian Goldfields has converted a remote dependency into a country of worldwide fame; it has attracted a population, extraordinary in number, with unprecedented rapidity; it has enhanced the value of property to an enormous extent; it has made this the richest country in the world; and, in less than three years, it has done for this colony the work of an age, and made its impulses felt in the most distant regions of the earth. With the exception of the more extensive fields of California, for a number of years the gold output from Victoria was greater than in any other country in the world. Victoria's greatest yield for one year was in 1856, when 3,053,744 troy ounces (94,982 kg) of gold were extracted from the diggings. From 1851 to 1896 the Victorian Mines Department reported that a total of 61,034,682 oz (1,898,391 kg) of gold was mined in Victoria. Gold was first discovered in Australia on 15 February 1823, by assistant surveyor James McBrien, at Fish River, between Rydal and Bathurst (in New South Wales). The find was considered unimportant at the time and was not pursued for policy reasons. In the 1850s gold discoveries in Victoria, in Beechworth, Castlemaine, Daylesford, Ballarat and Bendigo sparked gold rushes similar to the California Gold Rush. At its peak, some two tonnes of gold per week flowed into the Treasury Building in Melbourne. The gold exported to Britain in the 1850s paid off all of Britain's foreign debts and helped lay the foundation of her enormous commercial expansion in the latter half of the century. Melbourne was a major boomtown during the gold rush.