From The Private Life of the Queen, by “One of Her Majesty’s Servants,” 1897:

Her Majesty [Queen Victoria] takes delight in a clever riddle or rebus, but on one occasion she was very angry at having been hoaxed over a riddle which was sent to her with a letter to the effect that it had been made by the Bishop of Salisbury.

For four days the Queen and Prince Albert sought for the reply, when Charles Murray (Controller of the Household) was directed to write to the bishop and ask for the solution.

The answer received was that the bishop had not made the riddle nor could he solve it.