For these Persian wars and treaties, see Menander, in Excerpt. Legat. p. 113 - 125. Theophanes Byzant. apud Photium, cod. lxiv p. 77, 80, 81. Evagrius, l. v. c. 7 - 15. Theophylact, l. iii. c. 9 - 16 Agathias, l. iv. p. 140.