CADER IDRIS (" the Seat of Idris ")  , the second most imposing

mountain in North Wales, standing in Merionethshire to the S. of Dolgelly, between the broad estuaries of the Mawddach and the Dovey . It is so called in memory of Idris Gawr, celebrated in the Triads as one of the three " Gwyn Serenyddion," or " Happy Astronomers," of Wales, who is traditionally supposed to have made his observations on this peak . Its loftiest point, known as Pen-y-gader, rises to the height of 2914 ft., and in clear weather commands a magnificent panorama of immense extent . The mountain is everywhere steep and rocky, especially on its southern side, which falls abruptly towards the Lake of Tal-y-llyn . Mention of Cader Idris and its legends is frequent in Welsh literature, old and modern .