An expressman refers to anyone who has the duty of packing, managing, and ensuring the delivery of any cargo.

During the 19th century, expressman usually referred to someone was to ensure the safe delivery of a train's gold or currency in the express car. This job included

1. Guarding the safe or other cargo against bandits
2. Memorizing the safe's combination until delivery

The same name and concept was often applied to those who ensure the transport of wagon freight, as seen in Mark Twain's "The Invalid's Story."