What are the earlier references to Mary?
Belief in the incarnation of God the Son through Mary is the basis for calling her the Mother of God, which was declared a dogma at the Council of Ephesus in 431.
Development of Marian doctrine
The theological development of devotion to Mary begins with Justin Martyr (100–165) who articulated Mary’s role ...
I was a bit skeptical, but the quote appears to be legitimate. It's from one of Jerome's homilies. Merely searching for jerome manger silver, I found this page in The Homilies of Saint Jerome, Volume 2.
Here's a more complete quotation:
O, if only I were permitted to look upon that manger in which the Lord lay! Now, as an honor to Christ, we have ...