Well considering that none of the creationist sources that cite that quote have any information on WHEN that letter was written, I gave you one of his letters. I also posted a link to the
Darwin Correspondence Project that is working on a database of all Darwin's known correspondence.
This link is to the page that lists the letters to and from Gray.
If you want to give me a better citation of the letter in question, I will have no problem finding it.
Asgara
"Embrace the pain, spank your inner moppet, whatever....but get over it"
http://asgarasworld.bravepages.comhttp://perditionsgate.bravepages.com