Chris:
In retrospect, sure. But in 1830, Cowdery was Aaron-- tasked to "speak", "preach", and "declare faithfully the commandments and revelations" (D&C 28:3-4).
Can you show any evidence that LDS leaders were attaching 2 Nephi 3 to Oliver Cowdery prior to attaching it to Rigdon?
When Joseph met Sidney in 1831, his primary task was to "write for him." Preaching was mentioned, but only "inasmuch as ye do not write" (35:20-23). That is, preaching was envisioned as a secondary task for Sidney.
First, given that the first project they worked on jointly (openly) was the expansion of Genesis, I don't see anything unusual about that. Second, I'm not convinced the concept of a "secondary" task was as clear to them as it is to you. In other words, your first task, Sidney, is to produce the enlargement of Genesis, but, in your free time you can also preach (since everyone already knows you're good at it).
I'm not a believer, so obviously I don't believe it is true. (Or perhaps, like Dan Vogel, I am a secret Mormon in the pay of the Church to discredit the Spalding theory... ) This is a case of a revelation being recontextualized to serve a different function than that for which it was originally intended. Joseph did it all the time. So did the biblical writers, and so do nearly all modern prophets with substantial followings. Kim Clement didn't really predict 9/11, for example. But some language in an earlier failed prophecy sounded conveniently 9/11ish, so why not cash it in for some good press?
Certainly possible, but then it would seem to be
yet another coincidence that, without a conscious design by Smith (or with a conscious design but directed to another individual), the Book of Mormon would offer a scripture so readily adaptable to Rigdon as to be seen as *fulfilled* by him. For the Mormons, prophecy fulfilled. For you, coincidence that was recontextualized. For S/R par for the coarse.
By the way, I also ran across something that might interest you in Rough Stone Rolling. Bushman describes how Joseph often received his revelations "while he sat in council with his followers," in response to direct questions put to him on the spot. For example, on one occasion "John Murdock and several other elders asked Joseph to inquire of the Lord," and he immediately dictated a revelation. Pratt remembered that "each sentence was dictated slowly and very distinctly, and with a pause between each, sufficiently long for it to be recorded, by an ordinary writer, in long hand. [...] There was never any hesitation, reviewing, or reading back [... etc. etc.]" (cf. Bushman, p. 130). It does not seem that Joseph Smith had any opportunity to be coached by Sidney Rigdon in dictating such revelations.
I don't think Joseph Smith had to be coached by Rigdon on how to be a good con-man. He had plenty of experience at it growing up. It was the eloquence part he needed help with. I grant Smith's ability to slowly dictate alleged communications from God regarding a particular topic or question off the top of his head without aid from Rigdon. This is one of the areas where Rigdon underestimated Smith.
While not everyone could pull it off, it is not so terribly difficult that Smith's ability in this regard
disproves any reliance on Rigdon as the Book of Mormon was coming together. Mormons are quick to point out Smith's deficiencies in writing skills.
On the other hand, if Smith
did come up with the Book of Mormon off the top of his head, you have to hand it to him, in that he did an amazing job keeping track of all the details, characters, plots and sub-plots.
In the final analysis, if there were no compelling evidence & testimony for S/R,
then I could see the concept of Smith having
no need for Rigdon as a more compelling argument against conspiracy. As it is whether Smith needed Rigdon prior to 1830 depends on whether S/R is valid or not--not the other way around.
"...a pious lie, you know, has a great deal more influence with an ignorant people than a profane one."
- Sidney Rigdon, as quoted in the Quincy Whig, June 8, 1839, vol 2 #6.