Cowdery claims that the hill Cumorah "must excite the curious enquiry of every lover of the book of Mormon," but nowhere does Welch even mention it.
p. 20. "Designation of the Hill in New York State as Cumorah
"There is no record of Moroni having told Joseph Smith that the place where the abridgement was buried was Cumorah, or that the hill was once a great battleground. If this had been the place of those great final battles, it would be rather surprising tht it was not mentioned. We have only the scantiest of inferences that Joseph Smith ever called the hill "Cumorah." (D&C 128:20). However, he does not appear to have corrected Oliver Cowdery, who may have been the one to first name the New York hill 'Cumorah.' (Cowdery, 1835)."
That's it. Seriously.
It's possible that when Palmer wrote the book (it was published in 1981), the historical records were not as widely available as now. However, he specifically cited Cowdery's Letter VII in the July 1835 Messenger and Advocate. He characterizes that letter as merely showing that Cowdery "may have been the one to first name the New York hill 'Cumorah'." An unsuspecting reader would have little incentive to pursue such an inconsequential footnote and then look up the page number in the then-obscure 1835 newspaper.
What Palmer doesn't relate is that Cowdery's letter unequivocally identifies the hill Cumorah in New York as the Book of Mormon hill, that Cowdery wrote 1400 words of detailed description, that Joseph assisted Cowdery with the letters, that Joseph specifically authorized the republication of these letters, that they were reprinted in both the Times and Seasons and the Gospel Reflector, and that they were published as a separate pamphlet in 1844.
Palmer also doesn't mention--in fact, he denies--that Moroni told Joseph Smith the record was "written and deposited not far from that place," meaning where he appeared to Joseph in the house in Palmyra. Instead, Palmer adopts the two-Cumorah theory, meaning that Moroni carried the plates from Mesoamerica to New York. But Cowdery reports that Moroni told Joseph he wrote and deposited the record near Joseph's home. How could Moroni have written his record in New York if he didn't have the plates from which to abridge the Book of Ether? Or are we now also supposed to believe that Moroni carted his abridgment along with the record of the Jaredites from Mesoamerica to New York?
This has been more detail than most people want to know, probably, but it illustrates a widespread pattern of intransigent dogma that permeates LDS scholarship. I'm optimistic that soon, open minds will take another look at these issues and realize what has been going on for far too long.
N.B.: There's more about all of this that I'll get to when I get a chance. Let me know what other examples of suppression of Cowdery's Letter VII you've found.