What are the major principles of writing according to E.A. Poe? Refer them to The Raven.

I am not too sure which "principles of writing" you are
referring to, and you might want to post them to help editors like me answer your
question. I do believe, however, that I can respond as to how Poe tried to create
something new in this excellent poem, and, as the fame of this poem gives testament,
succeeded with great aplomb.

In writing "The Raven," Edgar
Allen Poe deliberately planned to create a verse form that was original and to invent
new effects using alliteration and rhyme. You might want to consider how he does this
using internal rhyme, which can be defined as rhyme that occurs within a line of verse
or repetition of an end rhyme within a line. Note how "dreary" and "weary" present this
phenomenon in the first line of the poem, swiftly supported by three more examples in
"napping," "tapping" and "rapping" just a couple of lines further on in the poem. You
might also want to consider the way that he creates remarkable rhymes in ways that are
completely unexpected. Note how "window lattice" is made to rhyme with "what thereat is"
in lines 33 and 34.

Likewise we see ingenious use of
alliteration to create an onomatopoeic effect. Note how this operates in line
13:

And the
silken, sad, uncertain rustling of each purple
curtain...

The repetition of
the "s" sound helps create the rustling of the curtain
here.

So, it is clear that Poe was trying to achieve
something new and distinctive in this poem, and we can see that he was successful in
this goal.