Places in Middle-earth
Type: Rivers & Lakes
Location: The Deeping-stream starts in the ravine named Helm's Deep, and possibly is the reason the ravine exists, cut by the action of the water over centuries. The stream flows northwest out of the ravine and down into the Deeping-coomb. It is unknown where it empties, but following the same general direction would lead it to the River Isen.
Description: ... A wall, too, the men of old had made from the Hornburg to the southern cliff, barring the entrance to the gorge. Beneath it by a wide culvert the Deeping-stream passed out. About the feet of the Hornrock it wound, and flowed then in a gully through the midst of a wide green gore, sloping gently down from Helm's Gate to Helm's Dike. Thence it fell into the Deeping-coomb and out into the Westfold Vale.
The Two Towers, LoTR Book 3, Ch 7, Helm's Deep
My father noted elsewhere that the Deeping-coomb (and Deeping-stream) should be so spelt, rather than Deeping Coomb, "since Deeping is not a verbal ending but one indicating relationship: the coomb or deep valley belonging to the Deep (Helm's Deep) to which it led up." (Notes on Nomenclature to assist translators, published in A Tolkien Compass, edited by Jared Lobdell, 1975, page 181.)
Unfinished Tales, Part 3, Ch 5, The Battles of the Fords of Isen: Notes, Note 6
Contributors: Lyllyn 8.4.03; added spelling quote & links: Elena Tiriel 17 Sep 04