Horace Walpole,
Memoirs of the Reign of King George the Second…
“ Fox replied, “I must know, Sir, what means I shall have, or I cannot answer for what I cannot answer.” “It will be better for you,” said the King; “you shall have favour, advantage, and confidence”—but would not explain particulars, only asking, if he would go to the Duke of Newcastle. “I must, if you command me,” answered Fox, “go and say I have forgot everything.” “No,” replied the King: “I have a good opinion of you; you have abilities and honesty, but you are too warm. I will send a common friend, Lord Waldegrave.” ”
