Hi, Dani. You asked about this verse:

But I will find Bonny Maud, merry mad Maud
   And seek whate'er betides her
   Yet I will love beneath or above
   The dirty earth that hides her. "

It seems to me that this is a reference to a poem called "Maude" by Alfred Tennyson. I vaguely recall that Maude's grave wound up under a crossroads, and her spirit was troubled by the clattering traffic above her.