Death Certificates were not required in TX until after 1900 and there are few before 1912-1915 or later.
I have a subscription to Newspapers.com and The Paradise Messenger is listed for 1880. I found in the attached article dated April 23, 1880 where J. B. Barnes filed for guardianship of the estates of the minor heirs of Harvey Youngblood. The Wise County Messenger in Decatur doesn't show any issues before 1883. There is no mention of what the cause of death was.