In 1812 a number of slave traders were prosecuted in Sierra Leone, the focus of Britain's efforts to eradicate the trade. First published in 1813, this report is believed to have been written by the presiding judge, Robert Thorpe. The trials provoked debate as Thorpe found one trader guilty, but commuted his sentence on the condition that other traders were persuaded to cease their business. Another was dealt with severely as he displayed complicity in evading the laws. Thorpe's judgments relied upon not only the application of the anti-slavery laws, but also the notion of natural laws transcending those of nations, a notion which came under consideration in the landmark Somerset v. Stewart case of 1772, concerning an escaped slave. Published in 1876, a report on this case is also reissued here. Taken together, these two texts provide valuable source material on the history of the slave trade's abolition.