It reminds one, not of the mood of Poe's verse, but of the spirit of the paintings of George Frederick Watts.

It is allied in some way, in my mind, with his "Love and Life," though but a single draped figure within doors, and "Love and Life" are undraped figures, climbing a mountain.
The boy, having said good-by, remembers the lady Annabel.

It is a crisis after the event.

In his vision she is shown in a darkened passageway, all in white, looking out of the window upon the moonlit sky.

Simple enough in its elements, this vision is shown twice in glory.