Allan Alexander Carswell (born 1935 in Ontario, Canada) became an apprentice at the Canadian Bank Note Company in 1954. He started out studying letter engraving but three years later moved on to picture engraving. At this time, the stamp engraver Yves Baril would become his tutor.
Carswell would later move on to the Security Bank Note Company in Philadelphia.
You will find Allan Alexander Carswell's database HERE.