CADER, a township, joint with Segroit, in the parish of LLANRHAIADR-IN-KINMERCH, hundred of ISALED, county of DENBIGH, NORTH WALES, 24 miles (S. by W.) from Denbigh. The population is returned with the parish. From a rocky elevation, by some called Cader Gwladus, or " Gwladus' Chair," and by others Cader yr Arglwyddes, or the "Peeress' chair," a beautiful view of the vale between Denbigh and Ruthin, and the hills rising above it on the east, including also the interesting remains of Denbigh castle, is obtained. At the foot of this rocky height, and imbedded in the limestone of which it is composed, are large masses of silex, which, when broken, are occasionally found to contain agate, jasper, crystallized sulphate of lime, and chalcedony: of these, the agate and chalcedony are pure, and exceedingly beautiful, and are discovered in as great a number and variety as, perhaps, in any other part of the world. This township was formerly conjointly assessed with those of Segroit Isla and Segroit Uchav for the maintenance of the poor.