Thanks Orlena for the additional info here and by email.
The SSDI record sure is OK. Not sure yet about the census records.
Name:Ruby B. Ott
State of Issue: Missouri
Date of Birth: August 06, 1905
Date of Death: November 08, 1995
Est. Age at Death: 90 years, 3 months, 2 days
Last known residence:
City: Carthage; Brooklyn Heights; Carytown; Fidelity; Kendricktown; Morgan Heights; Scotland
ZIP Code: 64836
I don't think I will be able to get headstone photos through the volunteer for the Park cemetery. My request bounced back to me indicating that the volunteer is no longer active. Plus, the list is very long.
I plan to ask the Carthage Library to lookup the obits for Walter and Ruby. Maybe Ruby's obit in particular will be helpful in finding/confirming her family and more info on them.