Two chapters of Henry Koster's Travels in Brazil are dedicated to slavery and "the impolicy of the slave trade" (chapters 19 and 20). Koster condemns the exercice of absolute power and potential for abuse inherent in slavery, and criticises the inefficiency of slave labour compared with free. He describes the arrival and sale of slaves in Brazil, slavery, manumission and creolization of African and European cultural influences in the plantations. In chapter 20 he condemns the "great moral evil" (445) of the slave trade.