The wars of Harun al Rashid against the Roman empire are related by Theophanes, (p. 384, 385, 391, 396, 407, 408.) Zonaras, (tom. iii. l. xv. p. 115, 124,) Cedrenus, (p. 477, 478,) Eutycaius, (Annal. tom. ii. p. 407,) Elmacin, (Hist. Saracen. p. 136, 151, 152,) Abulpharagius, (Dynast. p. 147, 151,) and Abulfeda, (p. 156, 166 - 168.)