The Carriers appear briefly in Henry IV, Part 1, Act 2, Scene 1. There are two of them, and they provide a glimpse into the lives of working-class characters in Shakespeare's historical plays. Their conversation touches on practical concerns of their job, such as the condition of the inn where they're staying and the items they're transporting. While they offer some humorous moments and minor social commentary, their role is limited and they do not interact with major characters like Falstaff. Their presence adds a touch of realism to the play's setting but they are not central to the plot or major themes.