Clove plantations such as Mgoli-the site on Pemba discussed in detail later in this book-were a typical part of the rural landscape of nineteenth-century Zanzibar. During the eighteenth century, Zanzibar, along with much of the rest of the East African coast, had come under the rule of Oman. It was only from the beginning of the nineteenth-century, however, that Zanzibar became a serious colonial outpost of Oman, with significant numbers of Omani immigrants (mostly men) coming to the islands. Omani colonial interests were largely focused on mercantile profits from the caravan trade, but the beginning of the nineteenth-century saw a shift; mercantile profits became increasingly invested into plantations. On Zanzibar, an accident of geography and history meant that clove plantations came to dominate the islands' agrarian economy. By the close of the nineteenth-century, Zanzibar was one of the world's major suppliers of cloves (Martin 1991).This last fact hints at the scale of transformation in the agrarian sector of Zanzibar during this period. But this was not simply a shift in terms of what was being grown. Clove plantations are interesting as they were also a root cause of social transformations across much of the islands. They were the institutions through which plantation residents came to understand their lives, through which social positions were often structured, and they were the context of the majority of day-to-day practices of Zanzibaris through the nineteenth-century. Slavery was at the heart of these transformations; agricultural and domestic labor was carried out by enslaved men and women from mainland Eastern and East-Central Africa. Enslaved women were also commonly present as concubines in elite households. As I discuss in greater detail in Chap. 4, the scale of slavery was immense; by the close of the nineteenth-century, enslaved or recently manumitted individuals outnumbered indigenous Swahili and other immigrant populations (even if the line between these groups were not always clear-cut). As several historians have discussed, the large immigrant African population, along with continued labor migration from mainland Africa, came to be decisive in the social and political formation of contemporary Zanzibar