What is another word for "messenger"?

Roget's Thesaurus (1911) lists these synonyms for "messenger": advocate, agent, ambassador, apparitor, arbitrator, attache, attorney, auctioneer, bag, bagman, bailiff, bearer, bellman, billet, billet-doux, boy, broker, bulletin, business, cable, card, carrier, charge, chit, chitty, chore, circular, clerk, commercial, commissary, commission, commissionaire, commissioner, committee, consignee, consul, corps, correspond, correspondence, correspondent.