Lecture at Dr johnson's house on the famous case in which Lord Mansfield ( who lived in Kenwood House) adjudged that slavery was lawful in Britain. Lord Mansfield said: The quotation (from Wikipedia) is as follows: .. The state of slavery is of such a nature, that it is incapable of being introduced on any reasons, moral or political; but only positive law, which preserves its force long after the reasons, occasion, and time itself from whence it was created, is erased from memory: it's so odious, that nothing can be suffered to support it, but positive law. Whatever inconveniences, therefore, may follow from a decision, I cannot say this case is allowed or approved by the law of England; and therefore the black must be discharged." For more information click here: