Cap'n

If as you say "I think that hewas trying to claim it as an arrangement, which of course is wrong artistically and morally" I presume you are referring to his accompaniament added at a later date.

If this was so then let us suppose that 'John Doe' was recorded singing a ballad. Peter Kennedy added himself to the recording. Assume that this accompaniment did not double the sales of the recording as people brough it to hear 'John Doe' not Peter Kennedy. Now let us suppose that this recording earned £x for the artists involved. By simple arithmatic 'John Doe's' earnings would have been £x but they are now actually £x/2. Has not half of 'John Doe's' earnings been taken by Peter Kennedy?