“…By 1900, some 370,000 hectares of land outside Java were held by private estates, with nearly another plus another 480,000 under various kinds of concessions; by the 1920s, there were 500,000 hectares under concession in North Sumatra alone, with private estates across the entirety of the archipelago claiming nearly 3 million hectares of land. 39 Enclaves of concentrated, and heavily capitalized, production dotted the landscape: a vast plantation belt along the eastern coast of Sumatra, tin mines on the islands of Bangka and Belitung, coal mines in West Sumatra, oil refineries in Borneo, and scattered mines and plantations elsewhere. Most notable was the so-called 'Deli belt' of plantations on the eastern coast of Sumatra:…”