Shadowy Seas.

The Shadowy Seas runs about 800 Miles from the Northern edges of Eldamar to far beyond Avathar and the peak of Hyarmenthir Southward and stretches nearly 400 miles out into the great Belegaer in a great curwe from its midmost point where Calacirya breaks through the Pelòri. In the Shadowy seas flowds the Twilit Isles and later was the Lonely Isle Eressëa rooted in the Bay of Eldamar.