In his return he saw Constantius twice - at Viminiacum, and at Caesarea in Cappadocia (Athanas. tom. i. p. 676 [tom. i. p. 236, ed. Bened.]). Tillemont supposes that Constantine introduced him to the meeting of the three royal brothers in Pannonia. (Memoires Eccles. tom. viii. p. 69.)