While reading through the thread, I just happened to notice that Twain was cited twice and it sparked my curiosity. I am aware (as I have followed the speculation thread previous to this year's event) and will agree with you that Emeric's clues in the past have emphasized on the context of a quote; whether it be obtained from a book, portion of a speech, poem (i.e. Don Marquis' "The Haunted" in reference to a post by Emeric this year) or any other work cited. Hence, I am in agreement that is not necessarily the source material which is of importance.
Indeed, both of the quotes reference Death and I did elaborate on this recurring theme in my reply to a fellow member of the site.
As I had stated beforehand it just happened to catch my eye. Furthermore, my posts never stated that Twain's works would concretely and literally influence or be present at this year's event due to Emeric quoting Twain a second time. It was purely an observation on my behalf.