John Lambe (or Lamb) (1545 - June 13, 1628) was an English astrologer. He established a reputation as man well-versed in astrology and magic. Calling himself Doctor Lambe (though he was not a licensed physician), he claimed that he could read fortunes, identify diseases, repel witchcraft, and locate missing or stolen items with his crystal ball. Rumors also emerged that he was skilled in the dark art of conjuration. In 1625, he attracted the attention of George Villiers, a favorite of King Charles I, and he eventually became the Duke's personal adviser. Some referred to him as, the Duke's Devil, and suspected he was exerting a supernatural influence over Villiers, who in turn influenced King Charles. Frightened Londoners made several attempts to punish Lambe for black magic, but due to the influence of Charles and Villiers, their campaigns were mostly ineffective. In 1627, he was accused of raping an 11 year old girl named Joan Seager, and he promptly received the death penalty, but he was able to postpone the execution. On June 13, 1628, an unruly mob stoned him to death as he exited a theater. No one was punished for the murder, and less than two months later, Villiers was killed, as well.