Somewhere in a Peterson publication,many years ago, there was an article on Jules and it was stated that he did his own engraving. I remember being surprised as I had seen several of his guns in Peterson magazines and never knew that. I remember there was a picture of him also and he looked very suave and continental with his mustache.Somewhere between 1967 and 1972 there are several publications with pictures and text regarding his work and I think most of them were Peterson publications. The "Guns&Ammo annuals come to mind.I am also aware that just because it has been published does not make it fact.Lord,Lord am I aware of that.