De Marnef Brothers, 1481-1550 -- Printer's Mark
![99850-Service File.jpg](/sites/default/files/styles/thumbnail/public/2023-12/99850-Service%20File.jpg?itok=7VIalkup)
Main (Thompson) Library location: North wing -- Sixth window. Brothers Geoffroy, Jean, and Enguilbert de Marnef printed collaboratively and shared a printing press in Paris at the Sign of the Pelican, founded by Geoffroy, from which they issued their first publication Les sept degres de l'echelle in