Engraving of Doctor L.A. Bertillon. From the work shown, published by his sons in 1883.Cropped and converted to grayscale with gimp. [Jacques et Adolphe Bertillon / La vie et les oeuvres du Docteur L.A. Bertillon, online at: https://archive.org/details/lavieetlesoeuvre00bert -- Public domain -- http://commons.wikimedia.org/wiki/File:Docteur bertillon.jpg]