You have provided alot of information for me to review, of which I thank you very much. I have contacted 24monstermom for their assistance as well. I have seen that tree but there were differences on the names so I was not certain they belonged to our family but hopefully they will respond to my email and clarify it. I am anxious to begin the search again. Your explanation about the birth certificates help resolve some of our concerns.
You message " Richard Walker and Mary Lou (nee: Harwell) had three children that were born in Giles County, TN and died in Texas. The siblings were: Walter E. Walker (12 Mar 1868 - 21 Jun 1947), Ada Ann (nee: Walker) Hickman (16 Apr 1870 - 19 May 1957), and Charley Edgar Walker (27 Sep 1872 - 7 Jan 1958). " Was that the Richard Lewis Walker you originally asked about? If so I may have confused the issue - the Richard Walker we had was born in 1949. There also seems to be confusion on the Charley Edgar - we have a Charles Elbridge. They probably are one and the same.
Once again, thank you so much to taking the time to help straighten this out for me. I will gladly check all this out as you suggested. Your help has been so valuable and greatly appreciated.