From the diary of Samuel Pepys (1663-1703)
At noon (my wife being gone to Westminster) I with my Lord Brouncker by coach as far as the Temple---in the way, he telling me that my Lady Denham is at last dead. Some suspect her poisoned, but it will be best known when her body is opened; which will be today, she dying yesterday morning. The Duke of York is troubled for her; but hath declared he will never have a public mistress again---which I shall be glad of, and would the King would do the like. ... thence to the Duke's house and saw /Macbeth/; which though I saw it lately, yet appears a most excellent play in all respects, but especially in divertisement, though it be a deep tragedy; which is a strange perfection in a tragedy, it being most proper here and suitable. -- Pepys' Diary, 7 Jan. 1667