Which two pairs of lines in this excerpt from "the raven" by edgar allan poe best show that the speaker is still haunted by the memories of lenore?

I believe it is:

But the Raven still beguiling all my sad soul into smiling,

Straight I wheeled a cushioned seat in front of bird and bust and door;

Then, upon the velvet sinking, I betook myself to linking

Fancy unto fancy, thinking what this ominous bird of yore —

What this grim, ungainly, ghastly, gaunt, and ominous bird of yore

Meant in croaking “Nevermore.”

This I sat engaged in guessing, but no syllable expressing

To the fowl whose fiery eyes now burned into my bosom's core;

This and more I sat divining, with my head at ease reclining

On the cushion's velvet lining that the lamp-light gloated o'er,

But whose velvet violet lining with the lamp-light gloating o'er,

She shall press, ah, nevermore!

Then, methought, the air grew denser, perfumed from an unseen censer

Swung by seraphim whose foot-falls tinkled on the tufted floor

"Wretch," I cried, "thy God hath lent thee—by these angels he hath sent thee

Respite—respite and nepenthe from thy memories of Lenore!

Quaff, oh quaff this kind nepenthe, and forget this lost Lenore!"

Quoth the Raven, "Nevermore."

answer: from these honored dead we take increased devotion to that cause for which they gave the last full measure of devotion—that we here highly resolve that these dead shall not have died in vain, that this nation under god shall have a new birth of freedom, and that government of the people

explanation:

  this riddles' answer is library.

  the "leaves" are a reference to the books' pages that the library contains; the branches are a network of libraries that connect multiple libraries' collections, resources, and items in a system of a common database, integrating them; the branches' organization are a useful management tool for coordinating the multiple collections many libraries have.