was a two seater,and you could, I suppose, be as crazed as JA supposes and ride with your legs out of one side and your head out of the other...mad woman that she was :-)

Here is a descriptionof a post-chaise (or chariot) from William Felton's bookA Treatise on Carriages(1795). William Felton was a master carraige maker,and his book was the first comprehensive book on carriages ever to be written:

A Post-chaise is a carriage intended only for expeditious travellling,and,for a close carriage is the most pleasant; the view in front not being obstructed by a coach-box not the draught impeded by any cumbersome weight:lightness and simplicity are the principals on which this carraige ought to be built, if intended for post work only...

Chariots are built exactly the same way as Post-Chaises, but are only so called from having an uniform coach box, intended for town use, and are usually built stronger than would be necessary for a Post-Chaise, though frequently used for both purposes, and are then built between the two proportions; for small families,where only one carriage is kept, a Chariot,with a moveable coach-box,is to be preferred, being lighter ,and more pleasant to ride in a coach.

Here's is a link to the story of the fabulous recreation of teh journey of the Trafalgar Despatch Route, which I saw with my husband and family on holiday in 2005,which shows the post chaise used.