The Influence of Writing Instruments on Handwriting and Signatures
Jacques Mathyer · The Journal of Criminal Law Criminology and Police Science · 1969
police scientifique et de criminologie of the University of Lausanne. Upon Professor Bischoff's re-tirement in 1963 he was named Professor and Director of the Institute. Professor Mathyer has par-ticipated in both the first and second International Meetings in Questioned Documents (London 1963 and Copenhagen 1966). He is a corresponding member of the American Society of Questioned Docu-ment Examiners, a regular member of the Chambre suisse des experts judiciaires techniques et scientifiques, and advisor to the International Criminal Police Organizaion.-EDrroR. Recently, I had to study a case in which some disputed signatures were written with pencil, while the standards of comparison were written with pen and ink. I looked in the literature in order to find documentation on that peculiar problem, and I noticed that most of the specialists in the field of handwriting of signatures examination had treated very superficially the question of the