There is something about those three rhyming lines in the last verse that reminded me of Blake's "London"
How the chimney-sweeper's cry
Every blackening church appals,
And the hapless soldier's sigh
Runs in blood down palace-walls.
But most, through midnight streets I hear
How the youthful harlot's curse
Blasts the new-born infant's tear,
And blights with plagues the marriage-hearse.
which led me to wonder if the whole of the poem was about the chaos and disintegration of contemporary life - but that, of course, does nothing to encompass the "girl dissolving" of the title.