Tractatus on John
Augustine's series of homilies on the Gospel of John.
Chapter I (The Six Days of Creation)
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Verse 28: Increase and Multiply
— Cited (Tract. 9) on the name Adam containing the four regions of the world in Greek
"says St. Augustine (Tract. 9 on John), the four regions of the world are contained in the name Adam in Greek through their initial letters."