CASTLETON, a hamlet in the parish of MARSHFIELD,
upper division of the hundred of WENTLLOOG,
county of MONMOUTH, 4 miles (S. W.) from Newport.
The population is returned with the parish. Here
anciently stood a castle, occupied, if not built, by the
Normans, to protect their conquest of Wentlloog, the
only remains of which are some small ruins of the
citadel, and the chapel, converted into a barn; near
the site is a barrow. On the level summit of an adjoining
hill there is a circular encampment, called Pen-y-
Park-Newydd..