The answer was that the crafts-person works with iron and other black metals. A whitesmith works with tin and other white metals, a silversmith works with silver and a goldsmith works with gold. I have photographed tinsmiths at work, but never knew that they might be called a whitesmith. I took a class in silversmithing in college (lost wax casting, wire work and hollow construction.)
I never know what I am going to learn in the great adventure of travel.
What surprising thing have you learned while traveling?