Herodotus, History 3.152–153. In an inscription the Cushite king Nastesenen speaks of defeating k-m-b-s-u-d-n. Hall (“Restoration of Egypt,” pp. 312–313), argues that this is a reference to Cambyses. George Reisner, however (Harvard African Studies 2, 1923), rejects this connection, maintaining that Nastesenen was much later than Cambyses. See G. Buchanan Gray, “The Foundation and Extension of the Persian Empire,” in The Cambridge Ancient History, vol. 4, pp. 20–21.