Gyropilot Hermes Iris Mercury Paul Revere Pheidippides automatic pilot bearer boatheader boatsteerer carrier cicerone commissionaire cowherd coxswain diplomatic courier dragoman drover emissary envoy estafette express go-between goatherd guide guidepost guider helmsman herd herdsman internuncio mercury message-bearer messenger navigator nuncio pilot pointer post postboy postrider river pilot runner shepherd steerer steersman tour director tour guide