Based on 1594 print by Jan & Raphael Sadeler after Marten de Vos which showed St. Fulgentius. I don't believe that Brueghel intended the reference to be to a specific saint; these paintings seem to be generic hermits. Yet the borrowing is, formally, very direct, almost an interpretation of De Vos like his slightly later paintings would be interpretations of his father's works. Here, in comparison to the original print, the saint has been moved farther back into the picture space and made smaller, less wild. The cave has shrunk. All the wildlife in the foreground is new. The view to the sea at the left is about twice its original proportion and Brueghel has especially increased the extent and exoticness of the distant city.