Hi,
Are there not any clues in the psysical book, regarding Oldfield ?.
The first many pages searching this topic ends up in libraries, book sites etc, some even claiming its the same person, eg. the author and "tubular bells" Michael Oldfield.
I read the book some 112 years ago or so. Inside the book there must be some more information on him, the author.
Good luck..
cheers peter