I had written the Cadman Requiem in 1989 for the Hilliard Ensemble in memory of my friend and sound engineer Bill Cadman, who was killed in the Lockerbie air crash. His death affected me very deeply and, pending a recording of this piece, Manfred Eicher asked if I might like to develop an instrumental work from this, using the same instrumentation for accompaniment and retaining the same opening bars as part of a new ECM album. The piece is "after" the Requiem therefore in the musical sense of b...