The image of Mariana in the lonely grange surrounded by decay strongly reinforces the theme of loneliness in Part 2 of the play.
One of the images that most reinforces the theme of loneliness in Part 2 involves the desolate setting where we find Mariana.
The imagery of her in a lonely, crumbling grange waiting for a man who is not arriving adds to the sense of endless waiting and dejection.
The repeated rhymes of "dreary"/"aweary" and "dead"/"said" throughout the poem contribute to the expression of loneliness and desolation.
Details such as the black moss, rusty nails, and a clinking latch add to the desolation of the scene and Mariana's mood, highlighting the despair engendered by loneliness.