The most authentic accounts of the two rivers, the Sihon (Jaxartes) and the Gihon (Oxus), may be found in Sherif al Edrisi (Geograph. Nubiens. p. 138). Abulfeda (Descript. Chorasan. in Hudson, tom. iii. p. 23). Abulghazi Khan, who reigned on their banks (Hist. Genealogique des Tatars, p. 32, 57, 766), and the Turkish Geographer, a MS. in the king of France's library (Examen Critique des Historiens d'Alexandre , p. 194 - 360).