180 Departed, have left no addresses. By the waters of Leman I sat down and wept . . . Sweet Thames, run softly till I end my song,
This connects directly to Psalm 137 where the communal lament there now exile after their captivity in Babylon. The departed not having an address connects to how the exiled are alone and are nowhere they are just existing in the desert and do have anything. The use of wept instead of longing for Jerusalem in Psalm shows a more negative connotation of rather than hoping just crying.