It took a bit of head banging, but I do remember the movie, late one night on Classic Movies.
The Citadel. "From WIKI"
The novel was made into a 1938 film with Robert Donat, Rosalind Russell, Ralph Richardson and Rex Harrison.
I can only assume that your man came across the good doctor during his illness and the work was loosely based upon this illness and the problems with coal dust and the miners in South Wales.
Fascinating

Now I need to get a copy of the book.
Unfortunately I have found no other reference to your man. Could there have been relatives in Australia as well as Philadelphia?
Neil
