"He assumed now the role of a practical magician, and astonished the city by the evocation of phantoms, which he caused to appear, at the wish of the inquirer, either in a mirror or in a vase of clear water. These phantoms equally represented dead and living beings, and as occasionally collusion appears to have been well-nigh impossible, and as the theory of coincidence is preposterous, there is reason to suppose that he produced results which must sometimes have astonished himself. All Paris, at any rate, was set wondering at his enchantments and prodigies, and it is seriously stated that Louis XVI was so infatuated with "Le divine Cagliostro" that he declared that anyone who injured him should be considered guilty of treason."
January 1, 1970
https://en.wikiquote.org/wiki/Alessandro_Cagliostro