Some years ago I there was a web page where one could download a selection of random, isolated tracks from Genesis bootleg recordings. I think it was linked to from the old message board. The tracks ranged from early '70s all the way to the Wilson era.
One of the tracks I got from there, which I didn't really listen to for a long time afterwards, was an early recording of Twilight Alehouse. It doesn't sound like it was performed in front of an audience, so it may be a BBC session track.
What strikes me about it is that it sounds distinctly less developed than the studio version, or even the La Ferme performance from 7 March 1971 (which was not long after Steve joined the band). It only runs about 6:15, not having the 2nd chorus or the instrumental break following it. Peter doesn't go up to a higher note on the word "wine," and he does the "laughter" by himself.
Some of the guitar playing sounds like Hackett, but besides that I couldn't give an opinion as to who the drummer and guitarist are on it. Either this would be (1) a performance with Steve & Phil right after Steve joined; (2) a performance with John Mayhew & Ant; or (3) the song somehow got less developed after the La Ferme gig. None of these sound very likely to me.
Is anyone familiar with this recording, and does anyone know when it was made?