Found on Ancestry.com. Listing of mothers and widows of those soldiers of World War One interred in Europe.
In 1920, Inez was living with her parents, no separate surname given, but marked as a widow.
1930 Census. Marlin, Falls Co, TX
Texas Death Certificate #78080. Inez S. Boyd died in Gainesville, Cooke Co, TX. She had lived there for 40 years. Her address was 522 N. Dixon. Inez was a widow. She was born 31 Oct 1898 and died at age 72, 24 Nov 1970. She was a housewife. Her father was Columbus D. Casey; her mother Sidney Fry. John Casey was the informant. Inez died of a heart attack; she was dead on arrival when she reached the hospital. She is buried Presbyterian Cemetery, Ladonia, TX.
Inez S. CASEY and Marshal David BOYD were married in 1917. Marshal David BOYD was born on 25 July 1891 in Cookeville, Putnam County, Tennessee. He died about 1919 at the age of 28.223
Marshal David Boyd registered for the World War I Draft in Ladonia, Fannin Co, TX. He was age 25, born 25 July 1891, in Cookeville, TN. He was a farmer and single. Medium height, medium build; blue eyes, dark hair. He suffered from rheumatism. June 5, 1917.
Died in World War I. Inez visited his grave in England in 1932.