Or maybe the Oral Torah is to be included, since according to the sages, it was communicated to Moses on Mount Sinai along with the written Torah (the Scriptures). For centuries, the Torah appeared as a written text only when transmitted in parallel with the oral tradition, whichguaranteed its authentic interpretation. ("Authentic." What does this do to the concept of "self-authenticating"?)
This authentic communication was memorized and often transmitted ipsissimi verbi by singing/chanting through the generations until Rabbi Yehudah haNasi was granted authority to inscribe it. His edition of Oral Torah is called The Mishnah. If that's part of God's Own revelation of Himself at Sinai, and it originated from God and had been preserved by His Providence for all the generations of His Chosen People from Moses to Yehuda haNasi, that's Torah, too.
St. Jerome didn't advert to it, as far as I know, though the Mishna in written form had been around for a century or more.
Interesting.
Not all of it was transmitted verbally. See Deuteronomy 6:4-9.
Verse 9 (NASB)
“You shall write them [These words, which I am commanding you today (v.6)] on the doorposts of your house and on your gates.”