The 17 demos for Say You Will

[Villavic]

In the album Wikipedia page it mentions Stevie left the band 17 songs to develop in her absence. It is actually a quote from a 2003 article in Uncut Magazine:

In 2001, when she was about to go on tour with her last solo album, she handed over a collection of 17 demos to Buckingham, Fleetwood and John Mcvie. "I went back through my vaults of tunes and picked all the ones I really liked but which for one reason or another had never seen the light of day," she recounts. Her colleagues picked five of them for the new album including "Goodbye Baby" and "Smile At You", written in 1975-76 and which "could easily have ended up on Rumours", according to Nicks.

Which songs from that list were not chosen? Does anybody know? Is the word vault a clue?

https://www.fleetwoodmac-uk.com/articles/FMart114.html