The Corporation or Liberty of Romney Marsh, although within Shepway Lathe, possessed its own Quarter and Petty Sessions (separate from the county).
- "A liberty was an English unit originating in the Middle Ages, traditionally defined as an area in which regalian right was revoked and where the land was held by a mesne lord (i.e., an area in which rights reserved to the king had been devolved into private hands). It later became a unit of local government administration.
- "Liberties were areas of widely variable extent which were independent of the usual system of hundreds and boroughs for a number of different reasons, usually to do with peculiarities of tenure." (Source:Wikipedia)
The Wikipedia article on Romney Marsh expands the details on this part of the country.