1. Adamson, A. H. (1972). Sugar without slaves: The political economy of British Guiana, 1838–1904. New Haven, CT: Yale University Press.
2. Allen, R. B. (2004). The Mascarene slave-trade and labour migration in the Indian Ocean during the eighteenth and nineteenth centuries. In G. Campbell (Ed.), The structure of slavery in Indian Ocean Africa and Asia (pp. 33–50). London: Frank Cass.
3. Anderson, B. (2004). Migrant domestic workers and slavery. In C. van den Anker (Ed.), The political economy of new slavery (pp. 107–117). New York: Palgrave Macmillan.
4. Anon. (1904a, April). The Congo ‘slave’ state. Baptist Missionary Magazine.
5. Anon. (1904b, April 6). Is England establishing a new slavery? Christian Observer.