'An Act for rendering more effectual an Act made in the forty-seventh year of His Majesty's reign, intitled, an Act for the abolition of the slave trade'
British Parliamentary bills relating to the abolition of the slave trade: George III, Chapter 23, 'An Act for rendering more effectual an Act made in the forty-seventh year of His Majesty's reign, intitled, an Act for the abolition of the slave trade', dated 14 May 1811.