Could Parker be
"Texas Deaths, 1890-1976," database with images, FamilySearch (https://familysearch.org/ark:/61903/1:1:K3SD-F4S : 5 December 2014), Daniel Parker, 22 May 1926; citing certificate number 18964, State Registrar Office, Austin; FHL microfilm 2,114,142.
It would help with sources of info you do know - e.g. for Calvert where did you get the death years of her and her husband? Family info? Do you know some places where they lived after birth?
