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Secrets Reveal'd: or, an open entrance to the Shut-Palace of the King: Containing, the greatest treasure in chymistry, Never yet so plainly Discovered. / Composed by a most famous English-man, styling himself Anonymus, or Eyraeneus [sic] Philaletha Cosmopolita [pseud.]: Who, by Inspiration and Reading, attained to the Philosophers Stone at his Age of Twenty three Years, Anno Domini, 1645. Published for the Benefit of all English-men, by W.C. Esq. [i.e. William Cooper], a true lover of Art and Nature. Public Domain Mark. Source: Wellcome Collection.