Captain Beefheart & The Magic Band
14/11/80 (early show) The Venue, London, England*

unknown gen SBD tape > hard drive > cool edit (hiss reduction, volume boost) > cd wav > flac

1. Safe As Milk
2. (Untitled)
3. Doctor Dark
4. The Dust Blows Forward 'N' The Dust Blows Back
5. Suction Prints

*based onthis link.
which lists an 18 minute sbd, although 'dust blows forward' & '(untitled)' are not on the setlist.
perhaps 'don van vliet a capella' from the late show is 'dust blows forward'
my tape was labelled 'london 1980'