Leo Grammaticus, p. 506, 507. Incert. Contin. p. 263, 264 Symeon Logothet. p. 490, 491. Georg. Monach. p. 588, 589. Cedren tom. ii. p. 629. Zonaras, tom. ii. p. 190, 191, and Liutprand, l. v. c. 6, who writes from the narratives of his father-in-law, then ambassador at Constantinople, and corrects the vain exaggeration of the Greeks.