Cecil Rhodes, the founder of the British South Africa Company, got his start by renting water pumps to miners during the diamond rush that started in 1869, when an 83.5 carat diamond called the 'Star of South Africa' was found at Hopetown near the Orange River in South Africa. He invested the profits of this operation into buying up claims of small mining operators, with his operations soon expanding into a separate mining company. He soon secured funding from the Rothschild family, who would finance his business expansion. De Beers Consolidated Mines was formed in 1888 by the merger of the companies of Barney Barnato and Cecil Rhodes, by which time the company was the sole owner of all diamond mining operations in the country. In 1889, Rhodes negotiated a strategic agreement with the London-based Diamond Syndicate, which agreed to purchase a fixed quantity of diamonds at an agreed price, thereby regulating output and maintaining prices. The agreement soon proved to be very successful – for example, during the trade slump of 1891–1892, supply was simply curtailed to maintain the price. Rhodes was concerned about the break-up of the new monopoly, stating to shareholders in 1896 that the company's "only risk is the sudden discovery of new mines, which human nature will work recklessly to the detriment of us all".