Gwathló

Gwathló (also "Gwathir" ,"Rive r o f  Shadow", W. "Greyflood"; A."Agathurush")  was the wide, slow-moving river that cutted  through southeastern Eriador.Formed by the confluence of the rivers Mitheithel (Hoarwell) and Glanduin, it carried water south-westward into the Belegaer.The Gwathlo separated Minhiriath from Enedhwaith and formed the long southeastern border of Cardolan. The ports of Tharbad, Suduri and Lond Daer were situated on its banks.