A (super honest and scholarly) fundamentalist named Davies has investigated the evidence for Christian and Jewish interpretations of an old earth prior to the 19th century.
Google
There are several of his good books on Amazon..
(This is his oldest but shorter book, and it was an honest investigation)
Amazon.com
He has a more recent one that is much longer.
Anyway, he has found no evidence of old-earth views predating the 18th/19th (even 19th I think) century scientific revelations. Therefore this is an interesting post, and it is groundbreaking evidence if true.
Based on Davies' books, he has found that there were (until now?) no Christians or Jews that were "old earthers". Huge Ross claims that Josephus, Philo, etc. held "old earth" views. People repeat these lies uncritically. Davies is honest enough to investigate. Davies wrote a favorable blurb for a book by Robert Best, "Noah's Ark and the Ziusudra Epic", which is somewhat anti-Bible book. He is a searcher for the truth and appreciates all helpful works.
Anyway, understand that the OP posted something that would be groundbreaking, if true (and it might be).