The Aged P. is borrowed from a Dickens’ story (I can’t remember which one). It was the nickname a rather long suffering fellow used for his dad, His “aged Parent”.
I think this same young man was the one who used to bemoan that all he owned was “portable property”, no real estate I guess.
I remember that character very well, I very much related to his angst and have thought of him often over the years.
Now, how accurate I am in my memories, that may be a different story! So, if I’m wrong, don’t scold me!
The Dickens story you are trying to recall is _Great Expectations_. The character is “Wemmick”, Mr. Jaggers’s legal clark in London. What a superb story it was!