[Footnote 40: See Pachymer, l. x. c. 25, 26, l. xiii. c. 33, 34, 36; and concerning the guard of the mountains, l. i. c. 3 - 6: Nicephorus Gregoras, l. vii. c. l., and the first book of Laonicus Chalcondyles, the Athenian.]