Forgot to mention. Re: 1940 Portland OR census;Robt C CLARK states he lived in Pensacola FL 1935, which pretty much verifies he was a member of Geo E HUGHES USN family, who was stationed this location 1935, and location of divorce of Pearl and marriage to Jean.
I think this is Robert Clinton CLARK b 10-12-1915 OR; d 4-4-1996 White Clay, Jackson Co OR S/Sgt USA....findagrave I don't know for how many yrs, but he resided Vet Admn Domicillary, White Clay.
This one is pure speculation. Jean shaved off a few yrs for the 1940 census Jean Rebecca BUNCH was b 3-1892 [1900 census] She seemed to sail thru husbands, so maybe.... Jean R PARKER b 3-12-1892 WA; d 8-19-1972 Sacramento CA [adj to San Joaquin Co where Geo E HUGHES died]
Your friend will need to do more research sans internet, and other than posting on this forum.Death certs, obits, etc. need to be obtained by contacting the appropriate courts and libraries [obits].