A couple days ago, I was thinking about the unused mellotron part for "A Rose for Emily" (I figured out half of it last week). I'm not sure about the part for the third verse yet, but the part during the second verse is only five pitches:
I realized that these are the same five pitches that make up the entirety of the lead vocal melody for the chorus of "Maybe after He's Gone" ("Maybe after he's gone / She'll come back, love me again...")
Were that mellotron part used for the final version of "A Rose for Emily," it would have been yet an-other musical element that ties the songs on Odessey and Oracle together.