In 1499 he appears (rather briefly) in the accounts of the court at Ferrara, another centre of North Italian printmaking. There is then no documentation until 1507, when another Paduan recorded lending him a painting and three copper engraving plates. This was in Venice, where most writers assume he was living by then. His engraving of an "Astrologer" is dated 1509 on the plate, and the only later record comes from the will of Aldus Manutius in 1515, when Manutius asks that he be given the work of cutting the moulds for, or perhaps designing, some printing type. At the period he also became a friend of the humanist and alchemical poet Giovanni Aurelio Augurello. Depicting his experiments with artificial blue pigments in his "Chrysopoeia" (Venice 1515) Augurello refers to Giulio ("meus Iulius") as the one person who at least is somehow profiting from the vain quest for gold.