According to Louisa Wood Ruby, this drawing was inspired by an etching by Hieronymus Cock after a drawing by Pieter I now in Prague. Jan may have owned either/both the drawing & print. The present drawing is inscribed: “In Milano 13 Gennaro 159[3 or 5]”. On the verso, an inscription in a later hand reads: “Brueglo 1593 en Janvier,”. No other document indicates that Jan was in Milan in early 1593. Bedoni & Ruby suggest that Jan could have made such a trip with Borromeo that year.
It is also possible that the date reads 1595 when Jan was definitely in Milan.
This drawing was very influential on the development of the forest landscape. Two copies of it exist -- one in the Fondation Custodia, Paris, and the other in a private collection in New York.