I'd question the idea of there being 1/3rd. No where near that amount, just a few from all I've gathered compared to the released ones, which are enough for anyone to go over in one lifetime, imo:
As for the few who are not available? Well, when you have access to the notes, the background info as I use to have but they've changed their online computerized access program a bit now....to restrict some notes. I still have the computer programs for them, BUT unfortunately, my computer is a Windows 7, and not really well equipped anymore to access a lot of this. It won't work with the new updated browser, and as far as I know, only with the old Internet Explorer. The brand NEW CD won't include those notes and background info.
Then of course there is the favored author status
like Sidney Kirkpatrick who was given rather unusual (for most) access to these people who had readings which you wonder about (Edison, Nikola Tesla and some whose names escape me now) ....Kirkpatrick has a lot of info that he has written about heretofore not released. I think he said he was given access to the"vault", lol.
Another one who wrote is Ry (Ryland) Redd, but his depth of curiosity before he passed away prematurely was seeking access to the readings in order to gain a deeper knowledge of his astrology. He wrote in the one I have (out of print now), but probably can be found online in used condition, ...not so much about the hidden ones you wondered about but about the "missing" ingredient he felt surely was there to explain to him what has since been written about and published, "the Past Life Astrology Review" and for awhile gained a lot of interest.
I attempted to explain what Ry Redd found, (in case his smaller pamphlet style book didn't adequately), that the "key" was in what he found out from the Vedic Astrologer B.V.Raman once in New York at a Vedic/Sidereal astrology symposium He told Raman about the confusion he had over the Cayce readings when it came to studying the astrology positions and people's past lives.
B.V.Raman told Ry that it sounded to hm like Cayce was speaking about what the hindus call Brahmin Angelic realms, and the guards which watch over these realms. [FONT="]Mr. Raman told him that he thought Cayce may have been referring to
the Sidereal Ascendant or the ancient concept of Loka found in the Brahmin religion sect. [/FONT]
I wrote in one entitled "Expanding on the Astrology of Edgar Cayce" Kindle and in another about the "key" being the Loka and how to find it. There are still many online Past Life Readings (Ry Redd was the FIRST person to ever walk in there in Va.Beach and be given access to the vaults to learn about astrology and computerize all he could glean after then talking with B.V.Raman for aid and assistance in the Sidereal)
Here is what the current President of the A.R.E. says about Ry Reddd's work:
https://www.edgarcayce.org/about-us...ast-lives-and-the-past-life-astrology-chart/#
By and large I'd agree with you that most of the family is dead and gone having lost Hugh Lynn Cayce, in the late 80s and then the younger son, Edgar Evans in the 90s and then the grandson more recently - Charles Thomas Cayce dearly beloved and admired. (he was once Cayce's own grandfather who died on that horse accident you may have read about when Edgar was very very young and use to appear to him in visions)
I don't know if this is why Charles Thomas (Hugh Lynn's son) was so beloved, but I think all of them were extremely nice people and very ethical.
I don't know that its changed much however, as his daughter (Edgar's great granddaughter) also is part of the A.R.E. perhaps not the everyday stuff, but certainly still playing a role in the organization.
I have no complaints about them except that they sold Shirley McLaine's book in their bookstore last time I was there a long time ago- which irked me because of the nonsense it asked people to believe. There is also a funny ending to that fiasco. But that's just my hangup . Where there is profit, they likely will sell New Age books for any author anyone heard about and wants to buy (imo) but they do a LOT of good with the funds left over after paychecks that is including prison outreach programs.
https://www.astro.com/astro-databank/Redd,_Ry
https://www.goodreads.com/book/show/28815453-toward-a-new-astrology
This is definitely "
off topic" now, so I bid a fond adieu on this subject, but if you open a thread I'd more then likely participate in it. My once favorite subject.
I'd say your best best today
for the Readings omitted would be to find some of them in the Sidney Kirkpatrick's books at the library or Amazon. I think he wrote yet another recently and likes to add these little known facts.