Hi KJ, Sorry but I didn't find anything about your B.P. Walker and Lena Burke in my Walker Family History.I would suggest you write June Boothe Ashworth, 526 N. Inwood Rd, Huntington, WV, 25701 for a copy of her book.She has contacts with other Walker researchers in all parts of Texas from writing her book and may be able to point you to a contact in Waco!
Since you didn't tell me when you great grandparents died in Dallas, Texas, I don't have any more clues to assist you.As I do live in Dallas, andfrequent the genealogy library here, I could have found what cemetery they were buried in or what other survivors were listed with a local funeral home if you had mentioned a year to go by. Look in the Freepages of Rootsweb's for Jim Wheat's Dallas County Archives which has a lot of information from the early 1900's to 1930's and some of the early Dallas cemeteries and marriages. There was a reference in the Walker book that James's sonJohn Walker moved to Waco, Texas probably after the Civil War.I have found a Walker Family Cemetery just south of Waco, McLennan County and Interstate 35 from other genealogy search engines.Try Rootsweb.com's other link to Texas Cemeteries and look for Walker Cemetery. James Walker of Brenham, Washington County had 16 children.His wife,Abelar Collett had died in Kentucky before he came to Texas.He is listed as a soldier in the Republic of Texas documents from Washington County.Any descendants to his line or his children would be eligible to apply for membership in the Son/Daughter of the Republic of Texas.