 Strabo, who does not mention the southern Himera, applies (evidently by mistake) very nearly the same words as Polybius to the northern river of the name.Ptolemy correctly places the mouth of the southern Himera to the east of Agrigento; he is the only one of the geographers who mentions both rivers of the name.Diodorus mentions the brackish quality of the waters of the Himera, which gives rise to its modern name of Fiume Salso