Trading in An Emerging Market: E. Johnston & Co and the Brazilian Coffee Trade 1840-1880Abstract: The article analyses the development of the coffee export business of the British company Edward Johnston & Co. in the years 1840-1880. Established in 1842 in the city of Rio de Janeiro, the firm's senior partner was the English merchant Edward Johnston. The departure of partners and the crisis of 1847 made Edward Johnston reorganise the firm in Brazil. In the 1850s, the company established itself as a family business based in Liverpool and then in London in the 1860s. The expansion of the coffee market in the United States made Edward Johnston create a network of firms which consolidated the company as a major exporter of Brazilian coffee by the late 1870s.