I believe your grandmother's parents were James Enos Pipkin (b. January 10, 1844 in Johnson Co., MO, d. August 3, 1927 in Ellis Co., TX) and Victoria E. Armstrong (b. near Tupelo, Lee County, MS, d. November 23, 1935 in Ennis, TX).They were married May 15, 1884 in McLennan County, TX.
This information comes from the Pipkin Family Association Website, where there is much more information about this family.The address is www.pipkinusa.org.Information about this family can be found in the Pipkin Family Association Newsletters, Volume 15, No. 4, July 1982 and Volume 23, No. 5, September-October 1990.
I could not find Emma Pearl in the 1900 and 1910 censuses, but I did find her in the 1920 and 1930 censuses.There she is called Pearl and Pearl E. and your grandfather is called Tom J. Mull.If you don't have access to these census records, I can send you the complete information.
If you have trouble accessing the Pipkin Family Association website, let me know.It shouldn't be a problem--the website is free.