Well, perhaps you’d be prepared to tell us more about it, especially all that stuff about how the Hebrew Scriptures had disappeared and had to be reconstructed by translating the Septuagint backwards, that was really interesting.
…
Without digging in my own archives for those old research projects (not even sure I’ll be able to find them, as it was several years ago, and several hard-drives ago

), but a quick google search yielded this:
*
The oldest surviving translation of Hebrew Scripture was the Greek Septuagint, which was undertaken by Jewish scholars in Alexandria in the third century before Christ (BC). The Greek codices arranged the books in a fourfold division, in
a different way than Hebrew Scripture, by placing the Law of Moses first, then the Historical Books, then the Wisdom books, and then the Prophets.
The Greek Septuagint was in circulation at the time of Christ and was widely read. In fact, the majority of Old Testament quotations in the Greek New Testament were from the Greek Septuagint Old Testament, primarily from Psalms, Isaiah, Genesis, Exodus, Leviticus, Deuteronomy, and the Book of the Twelve. For example,
when Jesus read Isaiah (61:1-2) in the synagogue at Nazareth (Luke 4:16-19), he followed the language of the Greek Septuagint. The early Christian Churches referred to the Septuagint as their source of Scripture. In his famous work The City of God (Book 18, Chapter 43), St. Augustine of Hippo considered the Greek Septuagint the authoritative translation of the Hebrew Scriptures, and appeared to follow the wording of Exodus 20:17 in the Greek Septuagint and Deuteronomy 5:21 for his enumeration of the Ten Commandments of God. The Orthodox Churches have retained the Septuagint for their canon of the Old Testament to the present day!
…
The Hebrew canon for Judaism developed in stages. The divine inspiration of the Law was recognized as early as II Kings 22:8f, and reaffirmed as Scripture during the Restoration (Ezra 7:6, Nehemiah 8:1, Zechariah 7:12). The Prophets were accepted as inspired Scripture by the end of the second century BC (II Maccabees 2:13, 15:9; Sirach Foreword, 49:10). While the Psalms were uniformly regarded as Scripture, the final books of the Writings took time to be clearly defined. It is now known with the discovery of the Dead Sea Scrolls that the Writings or Hagiographa often varied with each religious sect.
Following the Roman destruction of the Jerusalem Temple in 70 AD, the rabbinical school of the Pharisees
in Jamnia became a center of religious thought.
Faced with the affinity of the early Christians for the Greek Septuagint, it is believed that they refined the books traditional to Judaism, particularly the Writings. Jamnia considered 4 criteria to determine which of the Writings - such as Ecclesiastes, Esther, and Song of Songs - should be retained for the Hebrew canon for Judaism: the book should conform to the Torah; it was written before the time of Ezra (circa 450 BC); it was written in Hebrew; and it was composed in Judah or Israel. *
realhistoryww.com/world_history/ancient/Misc/The_Bible2.htm
NB: while this particular site doesn’t expressly mention it, if the oldest surviving translation of Hebrew Scripture was the Septuagint…what happened to the original Hebrew Scripture from which it was translated? Why bother with the Septuagint in Greek, if the original Hebrew Scriptures were available?