paper-reeds - rather, pastures, literally, “places naked” of wood, and famed for rich herbage, on the banks of the Nile [Gesenius]. Compare Gen 13:10; Deu 11:10. Horsley translates, “nakedness upon the river,” descriptive of the appearance of a river when its bottom is bare and its banks stripped of verdure by long drought: so Vulgate.
the brooks - the river.
mouth - rather, “the source” [Vulgate]. “Even close to the river’s side vegetation shall be so withered as to be scattered in the shape of powder by the wind” (English Version, “driven away”) [Horsley].