The woodcuts from one of Corbelletti's publications (Giovanni Antonio Brandi, "Cronologia de' sommi pontefici" ..., Rome: Francesco Corbelletti, 1627) are good examples of stripping applied for screening. One of the woodcuts (no. 152) in the book even shows a kind of a screening with hatching. Moreover, the arms on the title page of one of Corbelletti's 1639 "La perfettione del cavallo" (Francesco Liberati... Rome: Per gli Heredi di Francesco Corbelletti) already use a complete example of heraldic hatching. That means Corbelletti adopted the heraldic hatching system in the very next year after Petra Sancta's 1638 system. If we consider the time needed to prepare the engravings and the approval by the censure, Corbelletti must have known Petra Sancta's system even before 1638.