11. Gregory Nazianzen (Orat. iii. p. 90) re-proaches the
apostate with his ingratitude towards Mark, bishop of
Arethusa, who had contributed to save his life; and we
learn, though from a less respectable authority (Tillemont,
Hist. des Empereurs, tom. iv. p. 916), that Julian was
concealed in the sanctuary of a church.