The Heldasiril (Q "Naked Stream") was one of the principal streams that took its source in the Green Hills of Anfalas.The Númenórean venturers gave this stream its name because it was the first of the watercourses of southern Gondor to have its banks deforested by the felling of trees (a fate which was to befall the majority of the lands south of the White Mountains prior ro the close of the Second Age). Although innavigable, the Heldasinl was deep enough to necessitate a bridge at its mouth where it was crossed by the Rathon Gondor, next to the village of Iantras.