I have received a reply from the Social Security Administration regarding my request for a copy of Della Herring's Social Security Application form. The form confirms information I already have, and provides some new information.
Name: Della Minnie Herring
Address: 331 West Locust, Springfield, Missouri
Employer: Hamlin, Hamlin & Hamlin
Employer Address: 212 1/2 E. Commercial St., Springfield, Missouri
Age at last birthday: 43
Birthdate: September 10, 1893
Birthplace: Clinton, Missouri
Father: Marion Francis Herring
Mother: Sallie Alice Byers
Date signed: December 4, 1936
Signature: Della M. Herring
This confirms Della's parents, and that I have the right Della Herring. Also, it confirms the birth date and place.
New information is that Della's middle initial stands for Minnie. Also, her address and information about her employer at the time. There is a possibility that some information about her can be had from that source.
It looks like Della was living just a few blocks from her place of employment at the time.