John Dee
He met Edward Kelly in 1582 and Kelly became his companion. Kelly was a convicted forger. Kelly helped Dee to get visions from angels using a crystal ball. The angels gave them a language called Enochian and dictated several books through Kelly. Dee's crystal ball ended up in the British Museum. It went unnoticed for many years in the mineral collection. Most of the still existing papers of Dee are also in the British Museum.