One of the sources of the Anduin was this river of northwestern Rhovanion. The Longwell (S."Anthiel", "Anneithel", "Éo. Langwell") rose on the Gundalok near the peaks of the Hithaeglir claimed by Angmar. Despite its foul origin, it was swift, clear, and straight for most of its length.
- MERP:Angmar (2nd Edition)
- merp.com wiki