See Julian. Orat. i. p. 27; Orat. ii. p. 62, etc.; with the Commentary of Spanheim (p. 188-202), who illustrates the circumstances, and ascertains the time of the three sieges of Nisibis. Their dates are likewise examined by Tillemont (Hist. des Empereurs, tom. iv. p. 668 671, 674). Something is added from Zosimus, i. iii. [c. 8] p. 151 and the Alexandrian Chronicle, p. 290.