London, Wellcome Institute MS. 521. 34 + 13 + 13 folios. 225x165mm. 16th Century [c.1565.] Miscellanea Alchemica XVIII. [Collection of alchemical receipts, etc.: with a version of the 'Tractatus in arte majori' by Arnoldus de Villanova, and an unidentified alchemical work. In Italian and Latin.]