64. 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.