Radcliff and Gadget:
I made some progress using another person Helen Stephenson. Richard M Stephenson had a son Richard, who married Ellen M. Stephenson (who was English). They had a daughter Helen, who was my father's contemporary. What is interesting and ties into Gadget's reference to the 1880 survey results is the 1940 census.
Listed as living on Aspen Street were Ellen (2609), Joseph A. (2613) and Richard M. (2615). My father's older brother was Joseph Aloysius. It fits well. Ellen's husband was killed while working on the Pennsylvania Railroad and the 1940 census lists her as a widow. I think that's enough data points to confirm this piece.
More directly, I do not have a date of date for Mary, JPS's wife. I am visiting Old Cathedral Cemetary soon. They have records there that I can look at.
Again, all, thanks for your interest and help.