This work of Ambrose is no longer extant. It is again quoted by Augustin in his work, De Peccato Originali, c. 47 [xli.]; in his De Nuptiis et Concupisc. i. 40 [xxxv.]; in his Contra Julianum, i. 11 [iv.], ii. 24 [viii.]; and in his Contra duas Epist. Pelagianorum, c. 30 [xi.]. Ambrose himself mentions this work of his in his Exposition of Luke, Book ii. c. 56, on Luke ii. 19.