Surinam (Dutch colony) July 1667, and again confirmed in the Treaty of Westminster of 1674. After the other Dutch colonies in the Guianas, i.e., Berbice, Essequibo, Demerara, and Pomeroon, were lost to the British in 1814, the remaining colony of Surinam was often referred to as Dutch Guiana, especially after 1831, when the British merged Berbice, Essequibo, and Demerara into British Guiana. As the term Dutch Guiana was used in the 17th and 18th to refer to all Dutch colonies in the Guianas, this use of the term can be confusing (see below). The colonization of Surinam is marked by slavery. Plantations relied
British Guiana in the Anglo-Dutch Treaty of 1814. The UK continued separate administration of the individual colonies until 1822, when the administration of Essequibo and Demerara was combined. In 1831, the administration Essequibo-Demerara and Berbice was combined, and the united colony became known as British Guiana. The economy of British Guiana was completely based on sugarcane production until the 1880s, when falling cane sugar prices stimulated a shift toward rice farming, mining and forestry. However, sugarcane remained a significant part of the economy (in 1959 sugar still accounted for nearly 50% of exports). Under the Dutch, settlement and economic activity was concentrated