Sirnúmen also known as Kelusindi, and the Western Stream was a small stream in the western part of Aman.

Sirnúmen was situated in the hills at the western side of the Pelóri northwards of the city of Tirion and the main settlements of Valinor. Its length is unknown but it was sourced from Kapalinda. Afterwards, it continued into the Plain of Valinor until it reached the roots of Telperion and then into the deeps of Arda.[1]


Sirnúmen came down from the hills into a small plain area where Fëanor and his followers built Formenos.[2][3] and lived in exile after his banishment from Tirion.[4].


  2. The Atlas of Middle-earth, The First Age, The Elder Days, "Valinor"
  4. The Silmarillion, Quenta Silmarillion, Chapter VII: "Of the Silmarils and the Unrest of the Noldor"

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