The smaller-scale map that accompanies The Lord of the Rings and Unfinished Tales shows the Celos flowing into the Sirith from the east, while the large-scale contour map of Gondor shows it flowing from the west. A brief reference in Unfinished Tales suggests that the Celos was the next river eastward from the Gilrain, which would make the large-scale map correct.[note 1] The mistake was carried over to The West of Middle-earth at the End of the Third Age for the Unfinished Tales. Christopher Tolkien noted the error of the small-scale map in The Treason of Isengard; the correct location of the Celos is thus being the western tributary.
Later prints of the Unfinished Tales (but not all) corrected the labels.
Portrayal in adaptations
2014: The Lord of the Rings Online:
- The river Celos was located between Lower Lebennin in the region of Central Gondor and Upper Lebennin in the region of Eastern Gondor. The river Sirith joined it to the east, below the beacon of "Sirthanc". The village of "Erynos" stood across from the mouth of the Sirith, on the western bank of the juncture. South of the meeting of the rivers the combined river flowed south through the city of Pelargir and into the Anduin. The Celos was the domain of the lighthearted River-maid "Silverfroth", one of the Five Sisters, though she and her sisters were widely considered a myth by the time of the War of the Ring.
- The river's name on that map, incidentally, is spelled Kelos, but the pronunciation is the same in either case.
- J.R.R. Tolkien, The Lord of the Rings, "The West of Middle-earth at the End of the Third Age" [map]
- J.R.R. Tolkien, The Lord of the Rings, The Return of the King, "Map of Rohan, Gondor, and Mordor"
- J.R.R. Tolkien, Christopher Tolkien (ed.), Unfinished Tales, "The History of Galadriel and Celeborn"
- Wayne G. Hammond and Christina Scull (eds), The Lord of the Rings: A Reader's Companion, p. lxvii
- J.R.R. Tolkien, Christopher Tolkien (ed.), The Treason of Isengard, "XV. The First Map of The Lord of the Rings", p. 322 (note 9)
- J.R.R. Tolkien, Christopher Tolkien (ed.), Unfinished Tales, Index
- J.R.R. Tolkien, "The Rivers and Beacon-hills of Gondor" (edited by Carl F. Hostetter), in Vinyar Tengwar, Number 42, July 2001, p. 11