Phil, are you ready for a small world situation?
First, I think I found Robert Richards' obit:http://www.legacy.com/obituaries/tbo/obituary.aspx?n=robert-...
The age is right and the middle name would make sense given that Sidney Richards was his father.
Once I found that, I searched his name and discovered that the library where I'm a librarian (University of South Florida in Tampa) has some oral history recordings of Robert and his wife (done in 2006). Here are links:http://digital.lib.usf.edu/ohp/?doi=T30-00010http://digital.lib.usf.edu/ohp/?doi=T30-00016
The second link above is to a recording where Robert talks about his early childhood, and he mentions the death of his father when he was young. I think you'll enjoy this!