 The name "drysalter" or "dry-salter" was in use in the United Kingdom by the early 18th century when some drysalters concentrated on ingredients for producing dyes, and it was still current in the first part of the 20th century.Drysaltery is closely linked to the occupation of salter which in the Middle Ages simply meant someone who traded in salt.By the end of the 14th century there was a guild of salters in London.