In Pursuit of Freedom: Oaths, Slave Agency, and the Abolition of Slavery in Western Tanzania, 1905–1930

This article examines ways in which slaves and missionaries used public declarations before witnesses to carve out a distinctive space of legal proceedings in pursuit of emancipation in western Tanzania. This way of pursuing emancipation shows slaves deploying their intellectual creativity and cultural knowledge to shape the German and British colonial legal systems. Interviews provide evidence that these public declarations drew on long-standing practices of oathing in western Tanzanian societies, while administrative sources indicate that oaths had been used in Islamic legal practice. Both mission and administrative sources show that these public declarations became a fairly routine means to facilitate slave emancipation between about 1907 and the 1920s. They were seen as legitimate by both (ex)owners and (ex)slaves, and were welcomed by officials as they mitigated tensions between owners and slaves, and between slave owners and missions. This legal practice was not codified in either the gradualist German-era laws on slavery or the more proactive abolitionist laws enacted by the British. It was a bottom-up innovation, developed in a context in which effective emancipation depended on drawn-out struggles and negotiations over personal autonomy and malleable social norms.