We were all using Marshaltons by 1962 at Deertz' field school at La Purisima
Mission. Jim himself had a Goldblatz and swore by it as superior, but he
brought it from the East and it was unavailable locally. Even today, students
who turn up with cheap Korean trowel have life made rough for them (and their
hands), though the items don't last long enough to do permanent damage.