'The Mountains of Shadow', 'The Shadowy Mountains', the great curving range bordering Dor-nu-Fauglith (Ard-galen) on the west and forming the barrier between Hithlum and West Beleriand. 123-5, 127, 133, 137, 140-1, 150, 171, 182-3, 193, 206, 212, 232, 234, 238, 249, 254, 256, 261, 278, 281, 295