... over them. He let it be believed that the spirit in his sword had custody of the elixir of life, by means of which he could make any one live to be as old as the antediluvians. He also boasted that he had a spirit at his command, called "Azoth," whom he kept imprisoned in a jewel; and in many of the old portraits he is represented with a jewel, inscribed with the word "Azoth, ... — Memoirs of Extraordinary Popular Delusions and the Madness of Crowds • Charles Mackay