Giorgio Vasari reported in the 1568 edition of his "Vite" that Bernardo Buontalenti was currently at work on discovering the art of porcelain, but there is no sign that he was successful. The first successes were finally reported in 1575 by the Venetian ambassador Andrea Gussoni, who mentioned in his brief to the "Serenissima" that Francesco discovered the means of making "the porcelain of India," (i.e. the East Indies). Gussoni mentioned in particular the four qualities that made porcelain desirable, apart from its exotic rarity: