Wow a made a research project about Sean O'Casey in college. I didn't read any of his plays, but I did an exhaustive research about them, Shadow of a Gunman
was obviously one of them.
I remember he used to write about the suburbs of Dublin, the tenants, and of course war was always his main topic.
I've tried to look for [/i]Shadow of a Gunman on Google and a good bunch of related websites came up. Just try, best of luck!