It has been reported in recent years that Alice and Ravi Coltrane have in their possession master tapes and/or copies of many of the Coltrane Impulse era recordings previously listed in discographies as "lost." Some of this material has come out but she has gone on record (I believe) as saying that she intends to stagger its release and so we can't count on seeing much of it any time soon.
One part of this archive that has always fascinating me is the studio recordings from 1966. Although I consider Lewis Porter's book on Trane to be the best to date, I find his coverage of 1965-67 to be somewhat lacking. First of all, he lumps it all into one chapter and while he does provide excellent analysis of some of the 1967 material (no doubt taken from a separate article he wrote on the subject), he glosses over some of the material from that period or just mentions it in passing. He has a chronology in the back of his book which is quite interesting, but, no doubt not wishing to compete with himself (he and a colleague of his whose name I can't recall have published a separate discography), he only says "sessions for Impulse" under each date, which doesn't really help much.
Based on what other books and resources (Thomas, Simpkins, Wild) say, this is what I think I know: after Trane died, (in the 1970's) Alice put out two albums that contained much of what he recorded in the studio during 1966. These albums are:
(1) "Cosmic Music" (CRC AU 4950): contains "Manifestation," "Reverend King" and two tracks by Alice without Trane: "Lord Help Me to Be" and "The Sun."
(2) "Infinity" (IMP A9225): contains "Joy," "Peace on Earth," "Leo" and "Living Space."
These two albums are considered very controversial because Alice made significant overdubs to the material. Subsquently, undubbed versions of some (all?) of the tracks did come out on later LPs, but to the best of my knowledge the only track that has come out on CD in the USA is "Living Space."
Once when I was in London I saw a Japanese version of "Cosmic Music," but since I assumed it contained the overdubbs (and was costly), I balked. If I saw it again I might buy it, just out of curiosity.
In addition, there were other "lost" sessions from 1966 that have never been released in any form. David Wild says they included tracks such as "Darkness," "Lead Us On," and "Call" which have never been heard before, in either live or studio versions.
While I always used to wonder why Alice and Impulse didn't put out a CD with the "Cosmic Music"/"Infinity" material undubbed, now it seems to me that they are holding it back so they can put it out along with the "lost" material and so we won't hear any of Trane's 1966 studio material until it all comes out. When that will be, I don't know.
Anyone have any thoughts about this or know anything more about it?