This history of abolitionism, published by the London firm Ellerton & Henderson, attempts to convince Portuguese readers that the abolition of the slave trade would be beneficial for Portugal and Brazil. The history, covering three centuries of the transatlantic slave trade and ending with the 1807 Bill in the British Parliament abolishing the trade, is based on an abstract of Clarkson's history of the abolition of the slave trade, and takes a very British perspective, focusing on the campaigns of the Society of Friends, and the work of Clarkson and Wilberforce.