Rivil
The Rivil was a lesser tributary of the Sirion River. Its source was Rivil's Well in the highlands of Dorthonion, from which it flowed westward to meet the Sirion at the Fen of Serech.[1]

The Rivil was a lesser tributary of the Sirion River. Its source was Rivil's Well in the highlands of Dorthonion, from which it flowed westward to meet the Sirion at the Fen of Serech.[1]