This is a spell Jonathan Strange used on the King of Britain to try to cure the Kings insanity.
“Place the moon at his eyes and her whiteness shall devour the false sights the deceiver has placed there.
Place a swarm of bees at his ears. Bees love truth and will destroy the deceiver's lies.
Place salt in his mouth lest the deceiver attempt to delight him with the taste of honey or disgust him with the taste of ashes.
Nail his hand with an iron so that he shall not raise it to do the deceivers bidding.
Place his heart in a secret place so that all his desires shall be to his own and the deceivers shall find no hold there.
A Note: The color red may be found beneficial.
Revelations of Thirty-Six Other Worlds, Ormskirk”
Jonathan Strange & Mr. Norrell, Suzanne Clarke