57. Sextus Rufus (c. 26), who on this occasion is no
contemptible authority, affirms that the Persians sued in
vain for peace, and that Constantine was preparing to march
against them: yet the superior weight of the testimony of
Eusebius obliges us to admit the preliminaries, if not the
ratification, of the treaty. See Tillemont, Hist. des
Empereurs, tom. iv. p. 420.