You should get in contact with Greg Weeks from Project Gutenberg. He can tell you for sure if the book is public domain or not. http://durendal.org:8080/
If the book has been published before 1923 then it is safely in the public domain. If not it probably needed copyright renewal.
I checked in this database http://collections.stanford.edu/copy...e?forward=home
which tells us that the book may have its copyright not been renewed. This does not mean it is out of copyright. It means that more digging is needed.