What birth location is listed on Elvira's death certificate? If you don't have a copy, you can obtain one from the Health Dept in Oklahoma City, OK. Death certificate should also list names and birth location of her parents, and name of mortuary. What birth location did she give on the 1900 census? Did you lookup her parents on the 1880 census when she would have been about 9 yrs old? What birth location did her parents give for her? Did she marry hus #2 soon after the death of hus #1? Then she probably married #2 in Cooke Co, TX where hus #1 died. Check Cooke Co, TX GenWeb site, some GenWeb counties are putting their cemeteries online, you might find Rabourn and get his exact death date, with that you can obtain a copy of his death certificate, too. See if there is any info on marriages on the Cooke Co, TX GenWeb site, some counties are putting other records online, also. Post a query on that site, you never know who else might be working on the same line. Do you know when and where Dave & Mary died? If so, you can follow same procedures on them, too. TX began keeping vital records in 1903, and OK in 1908.