From Ultimate Reality according to Augustine of Hippo by Roland Teske:

Toward the beginning of this century Prosper Alfaric touched off a storm of protest when he claimed that both morally and intellectually Augustine of Hippo was converted to Neoplatonism in 386 ratherthan to the Gospel (Alfaric, I 9 I 8, p. 399), even adding that, if he had died shortly thereafter, he would have been remembered as a committed Neoplatonist, slightly tinged with Christianity (Alfaric, 1918, p. 527).