lg, did I say it was an obscure poem? Na... I don't think I said that; said obsucre and invented language. And following one of your suggested links, I think I found the answer:
[
www.victorianweb.org]
It likely was opium. LC was outa-here... never never land.
And lg, it was not I who was looking for the "work", the exercise would be good for our young friend here, DeepThinker. I'd like him to become a great poetry analyst like you, Hugh, Pam & Steve.
;-)
E.