I haven't checked recently, but at my last look the Sing Out! index included only the "published" songs. It does not index lyrics and lyric fragments that pop up in the correspondence and commentary columns - which is where something like the union parody would most likely be found. I'm not sure whether it even includes stuff from the SongFinder column - my recollection is that it did not.

My own index of some of the "interesting" fragments for the magazine issues we have doesn't show anything; but maybe it just wasn't interesting when I went through them - although anything that triggered a memory probably would have been noted.

John