TREMATON, (Cornwall) on the W. side of Saltaflj, on the r. Liver, that runs to the Tamar, had a caftlc that was anciently
the seat Earls, and other chief governors of Cornwall, who had a steward and bailiff, to which duchy it still bel. though
it was fallen to decay, even in the R. of James I. so that its ruins are now as thick tapestry'd with ivy, as formerly
with arras. It has been since converted into a prison for capital offenders within the Lp. This place was also the head of
a barony, which the Ds. of Cornwall had in these parts; and here was once a Mt. It now has the honour of giving title of
Visc. to the D. of Cumberland.