I wonder if Mrs. Lillian Kimbrough is possibly a sister.
You suggest to send them off to the SSA office to see if he filed. What are the "them" documents you are referring to?

Again, Thank you so very very much for your wonderful, wonderful input in this. I will update my still living grandpa, son of Harry Clyde Johnson on what YOU found and let him know that this could POSSIBLY be him...

Thanks, again

Don