"Tortoise and the Hare"

I figured out the chords for "Tortoise and the Hare" last night, and I was reminded of a post I wrote about the song a little over two years ago.  I noted that the "heavy"s in the lines "And your load is so heavy" and "While your load was so heavy" are sung with a descending melisma (F F Eb C), giving a sense of being pushed down by that weight.  Alternatively, because these "heavy"s are preceded by "so"s, those melismas could indicate a sense of degree.