A couple of years ago I found this message on some forum but it had been posted 2 or 3 years earlier. I tried to contact this person Greg Woods but he never answered. This is what he wrote:
Last Month I went to an village in Mexico named La Mesa de Abajo. The village is in the state of Chihuahua, just across the border from Sonora. The villagers were descendants of Confederate soldiers who moved south of the border after the Civil War. The men names are Emil Clark, William Clark, Thomas Moore. Another man came later. His name is David DeMoss 1855-1952. The men married Mexican women and founded Bermudez, a town about 10 miles from La Mesa. Their children founded La Mesa about 1908. The two Clarks might be related. I don't know any parents' names. I think the two Clarks and Moore were born in the late 1840s.
The reason for this post is that I offered to find their distant US cousins. One of the young men from the village wrote a book about the history of La Mesa (150 pages handwritten). They want to send copies of the book to their US cousins. I have the young man's address (he is at an university in Cd. Obregon, Sonora). I know a little bit of information. But I will go back to the village or know people who will go back there in the late Winter/early Spring. Please send me an email or reply if you can help me with finding the cousins.
Sincerely,
Greg Woods

hello, I of the history of us very little watch the truth moore and my grandmother is moore d moss I have familiaren down rocks in it of, Mexico I wait for ayudarte in something if you like comunicate with me take care .

quiza nos podamos ayyudar mutuamente - yo he encontrado ya mucha informacion sobre la familia Moore

Mi papa es Demoss Clark. Me interesa saber mas sobre el la historia de los apellidos.

Hi my name is Edna I read the last updated post about the Clark, Moore & DeMoss last names, my mom's name is Margarita Clark & is 1 of 12 children from my grandmother who's name is Catalina Clark Garcia whom was married to my late grandfaher Juan Clark Moore who also had or has cousins by the name of DeMoss, my grandmother along with most of my aunts & uncles live in a rural town in Sonora by the name of Villajuarez aka Benito Juarez just about an hour from Obregon in which i also have some cousins, there has been alot of contriversy in our last name as my grandfather was always very quiet about it's origin he died early from cancer at around age 50 & my grandmother who's now about 94 years of age cannot really give us much usefull information, so me along with one of my local 2nd cousins from the DeMoss line just found eachother recently about 1 1/2 yrs ago and are trying to put things together now, if anyone has updating info please reply back soon.

my grandmothers name was Teresa Moore DeMoss and she was from that place in Chihuahua call Bermudez, and I have some relatives with the last name Clark, my last name is Moore i hope you can give me some info. about my last name history becouse i've always wanted to know more about it.