There were two additional albums of non-Child ballads in the series that were recorded but never released; they were designatd the title 'Second Crop'. Peggy confirmed that they were made, but doesn't know what happened to the masters - wonder if anybody else does. I tried to trace both of these, got no further than a list of their contents
There was also to be an LP of a lecture on ballads (in front of a live audience) which was recorded for public release (I'm certain of this as I was in the audience in Decca's Hampstead Studio - around 1969). Great lecture, but again, never issued.
Jim Carroll