Thank you. I found Robert Brockie on the LDS mega-site, saw his occupation was "Inmate" and wondered if he was in a hospital or a prison.
Ancestry.com has the Carbondale Newspaper 1960 - 1977 in their archives. I confirmed Thelma's maiden name there with an obituary:
Southern Illinoisan (Carbondale, Illinois)
20 May 1976, p. 20
Obituary of Pete Emert, d. 19 May 1976 in Herrin, mentions "sister, Thelma Childers of Chester."
(I edited this an hour after I posted it. In the first version I had Thelma as Pete's daughter)
I haven't started working on Vernon. He is in Coulterville, Randolph, Illinois in 1975, according to brother Brocky's obituary. But, there are not that many couples named Vernon and Geneva Childers in the US, so they may have gone there, than came home to southern Illinois to retire.