What is a post chaise?

Detail from Pollard, The Mail Changing Horses at “The Falcon” at Walthamstowe, image from The Autobiography of a Stage Coachman, courtesy Archive.org

In A Duke in Shining Armor, my characters travel, at one point, in a post chaise.

At the Jane Austen Society of North America, you can read Ed Ratcliffe’s carefully researched and detailed paper on transport in the early 1800s. If you scroll down about a third of the way you’ll come to the post chaise part. On her website, Candice Hern covers th...