These tapes were given to Dave Cousins, who released them as a CD on the Strawbs own Witchwood Media label. The recordings were made in Alex Campbell's flat at 19 Rupert Street, Glasgow, on 5 Aug 1967, not long after the Strawbs and and Sandy had returned from their Copenhagen recording sessions. So the version of "Who Knows Where The Time Goes", though a very early recording, is not the earliest.
There's also an early version of "She Moves Througnh The Fair" which Sandy recorded on her first album with Fairport Convention. All these recordings were unknown at the time Island compiled its 19CD complete Sandy boxed set, so they do not appear there.