There really does not seem to be anyone of that name as a writer. It could be a pseudonym - and if the play is only a script and unpublished, then finding the author is frankly almost impossible.
The text is not that of a 19th century writer - it is much more like the kind of plays produced for amateur actors and published by companies such as "Samuel French".
You can get round this problem by inserting a disclaimer in your book:
All efforts have been made to trace the author of this work without success. The publisher will be happy to hear from anyone who has information about this author.
Sorry I can't be of more help
