Poetic Techniques and Mood in Poe

Which of the following best describes the techniques used to develop mood in these lines by Edgar Allan Poe?

Ah, distinctly I remember it was in the bleak December;

And each separate dying ember wrought its ghost upon the floor.

Eagerly I wished the morrow;--vainly I had sought to borrow

From my books surcease of sorrow--sorrow for the lost Lenore--

For the rare and radiant maiden whom the angels name Lenore--

Nameless here for evermore.