The following is found at www.findagrave.ca
for Jesse Montgomery Parker buried at Boquillas Overlook, Brewster County, Texas, USA:
Jesse Green Montgomery Parker was born in Bee County, Texas. He married Mary Ann DuBose on 7 Nov 1877 in Bee County, Texas. Jesse discovered the largest cinnabar/quick silver deposit in Brewster county along with son-in-law Thomas Devine McKinney. Legend goes he died on horseback and was buried near where he was found. Jesse prospected or ranched in the Big Bend Area up until death.
Jesse's father is Thomas Sherwood Parker who served in the Confederate Army. He enlisted in Bee County, Texas under Captain AC Jones. Thomas is buried in the Parker Cemetery along with his parents in Bruce, Mississippi.
Jesse's mother is Emily Lavinia Moore Wood Parker. She married Thomas in Yalobusha County, Mississippi on the 21st day of May 1850 after the death of her first husband Grandison Wood. She was brutually murdered along with Jesse's Sister, Emily Parker Simmons, and nephew in Bexar County during April 1881. Although their murders made headlines nationwide, each of their grave locations remain unknown.