I found no death record and probably will not for H H Farrer. Texas did not begin to record deaths until 1903 at State level.

Unless I found the wrong Roberta Lee Chivers it is possible she remarried since she was so much younger than Henry H Farrer. She was about 18 when she married Henry but I was unable to find that she was the mother of any children from the Texas death certificates.

I would concentrate in Lavaca and Aransas counties to start with the burial of Sarah J Sewell Farrer. Henry may be buried with her. I presume Charles A Farrer and his sister Rosalie Farrer Grissom are buried in Lavaca county.

By the way Victoria county, location of Farrer Cemetery, connects to Lavaca county on the south with DeWitt and Jackson counties on each side of Victoria Co. Wilson county is between Bexar and DeWitt. Here is link to Texas county map, TXGENWEB. http://www.txgenweb.org/tx/txmap.htm