In the last episode, we spelled out the names from the Huntsville school and attempted to find alternate documentation for them. Most of them came from identifiable families, were listed in federal census returns, or were listed in online genealogical studies such as family trees.
For the remainder, we give it another shot. With a little bit of extra effort, we've identified most of the remainder.
There still isn't anything on Barbour or the (van) Burens. Keep in mind that it's always possible that this letter is the only documentary proof of the existence or residence of a person.
Hugh F. Berry Living in War Eagle in the 1880 federal census:
Edward Barbour Nothing found yet for Barbour in Madison Co. 1869-1901. There are Barber families.
M. S. Newton Probably Mack S. Newton, born in 1860, and in 1870 living in the house of P. W. and Mary A. Newton, in War Eagle. Mack's siblings David and Miles are with them in 1870, but in the 1880 census are living with other people. See http://wc.rootsweb.ancestry.com/cgi-bin/igm.cgi?op=GET&db=lcy&id=I18163&style=TABLE . Ancestry.com has him in the 1870 census reports, and suggests he went by Sterling as his first name.
W. Van Buren Nothing found yet. "No records found" for Buren in Madison Co. 1869-1901.
W. P. Buren Nothing found yet "No records found" for Buren
Johnnie Moody Not found. There is a Johnnie "Moady" in Huntsville in the 1880 Census, sibling to Allie (below), but there identified as a Daughter. https://familysearch.org/ark:/61903/1:1:MNWX-4YH
Allie A. Powe Nothing found yet. There are Powe families in Arkansas.
Fannie Richmond Nothing found yet. No one named Richmond in Madison Co. 1869-1901?
Bell Parks Not found; there are Parks families in War Eagle in the 1870 census https://familysearch.org/ark:/61903/1:1:MNWX-CM3 but daughter Mary Bell Parks would only have been 2 years old in 1874. Still working on this one.
Selina Copeland Probably the Lena B. Copeland, stepdaughter, living in the house of Joseph and Martha Williams in 1880. https://familysearch.org/ark:/61903/1:1:MNWX-VQZ
Clint Kenner See Susan C. Kenner, born 1856, daughter of Matilda Kenner, in the 1880 census:
Her name is given as Clintonsie Kenner in the 1900 census for War Eagle, still as the daughter of Matilda.