William Murray, 1st Earl of Mansfield, SL, PC (2 March 1705 – 20 March 1793), better known as Lord Mansfield, was a British barrister, politician and judge noted for his reform of English law. He served as a Member of Parliament for Boroughbridge, where he was noted for his "great powers of eloquence" and described as "beyond comparison the best speaker" in the House of Commons. He thereafter became Attorney General, and then Lord Chief Justice of England.