Several of these I hadn't seen before, and they are very important for those interested in the Book of Mormon geography question.
For years, Mesoamerican advocates have claimed Joseph Smith i) wrote the anonymous articles in the Times and Seasons that linked the Book of Mormon to Central America and ii) wrote a letter to Dr. John Bernhisel of New York that suggested Joseph read Stephens' books about Central America and approved of those books as evidence of the Book of Mormon.
I think both of those claims are false.
I explained my reasoning and the detailed historical evidence in my books The Lost City of Zarahemla, Brought to Light, and The Editors: Joseph, William, and Don Carlos Smith. For those not familiar with those books, they discuss the detailed historical evidence that supports my assertions that:
1. Everything Joseph Smith taught about Book of Mormon geography related to a North American setting.
2. Joseph never connected Central America to the Book of Mormon.
3. Everything that links the Book of Mormon to Central America cannot be linked directly to Joseph Smith.
These new 1842 documents support the positions I took in those books.
I blogged about the detail here:
I don't know how many people still believe the Mesoamerican theory that is being promoted by Book of Mormon Central and a handful of scholars. I expect the number to continue to dwindle, for many reasons.
It's fascinating to watch as the Mesoamerican theory just keeps disintegrating before our eyes.