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William Murray, 1st Earl of Mansfield

British judge
William Murray, 1st Earl of Mansfield

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.


  • An estimated value is a precarious measure of justice, compared with the specific thing.
    • Fisher v. Prince (1762), 3 Burr. Part IV. 1365.
  • Anciently, the Courts of justice did sit on Sundays.
    • Swann v. Broome (1764), 3 Burr. Part IV., p. 1597.
  • The last end that can happen to any man, never comes too soon, if he falls in support of the law and liberty of his country: for liberty is synonymous to law and government.
    • Rex v. Wilkes (1769), 4 Burr. Part IV., p. 2563.
  • As mathematical and absolute certainty is seldom to be attained in human affairs, reason and public utility require that judges and all mankind in forming their opinions of the truth of facts should be regulated by the superior number of the probabilities on the one side or the other whether the amount of these probabilities be expressed in words and arguments or by figures and numbers.
    • Reported in Andrew Stuart, Letters to the Right Honorable Lord Mansfield (1773), p. 29.
  • Whatever is contrary, bonos mores est decorum, the principles of our law prohibit, and the King's Court, as the general censor and guardian of the public manners, is bound to restrain and punish.
    • Jones v. Randall (1774), Lofft. 386.
  • A man wants no protection when his conduct is strictly right.
    • Bird v. Gunston (1785), 3 Doug. 275.
  • Tut, man, decide promptly, but never give any reasons for your decisions. Your decisions may be right, but your reasons are sure to be wrong.

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