A raven is a lonely dark bird that hides in the deepest forest to find sparkling stuff to collect and give them to their secret love. And the writing desk is where a lonely writer sits to give imagination to his lonely mind. Waiting in the darkness of his poems, waitng for someone to read them, to discover them. To be a tiny hope for someone in the distance of the deepest forest.

Writing desks quoth not "Nevermore"?

Ravens don't write, silly

A raven is an animal. On the other hand, a writing desk is a piece of furniture.

Haven't any of you read 'Alice in Wonderland'? This is a riddle which the Mad Hatter asks. The whole point of it is that it has no answer, although Lewis Carroll later provided this as an answer: "Because it can produce a few notes, tho they are very flat; and it is never put with the wrong end in front!" This is a not especially amusing pun on the word 'note', which can be both a short letter (from a writing desk) or a sound (from a raven).