I found two Sunset Memorial Parks in TX; one in Upshur Co, near Gilmer and one in Bexar, with nearest large town of San Antonio. I assume that is the one where Frank is buried.You might find out his death date from cemetery, or burial records.
TX Dth Idx Online 1964-1998:
Charles B. Hill, d 2 Jul 1989 Bexar Co, TX [He does not show up on SSDI, he was 64 when he died, and may not have been collection SS benefits, yet.]
Combined info from TX Dth Idx online and SSDI:
Jack Hill, b 23 Oct 1907; d 26 Jun 1984 Brazoria Co, TX; last residence West Columbia, Brazoria Co, TX; SS card issued in TX.
Waddie Hill, b 3 Dec 1903; d 13 Jun 1980 Harris Co, TX; last residence Houston, Harris Co, TX; SS card issued in TX.
TX Birth Idx:
Hal Bates Hill, b 22 Nov 1928 Galveston Co, TX; mother Fannie Black; father Waddie Tago Hill.
I do not find Hal on SSDI, maybe still alive.Using online directory http://www.four11.comhttp://www.four11.com -- there are two Hal Hills in Houston.Maybe the above Hal and a son(?)
Combined info TX Dth Idx Online and SSDI:
Mary Frances Lindsay, b 14 Nov 1918; d 6 Jul 1992 Bexar Co, TX; last residence Van Ormy, Bexar Co, TX; SS card issued in TX.
Bernard Lindsay, b 20 Jun 1910; d Apr 1983; last residence Van Ormy, Bexar Co, TX; SS card issued in TX [I do not find him on TX Dth Idx, he may have died out of state, while traveling?]
I found two sons for Mary and Bernard b 1946 and 1948.I will email you direct with that info.This info late enough I don't feel comfortable putting it on a forum.