@ KevinH: Thanks for the word about escaping the special characters! I found the
Regex help page. That will help a lot.
@ Doitsu: Thanks for the special edition plugin! It worked great!
Now I have another problem..
The ebook I am editing has about 1750 html files most of which will need footnotes added. Is it possible to do use this plugin over and over on various files? I can't put ALL of the notes into one note html. I will need to have many different pages of note files related to groups of html documents (books of the Bible). Am I asking too much of this plugin?
What worked this last time was deleting the files that were already footnoted with FootnoteLinker, and running the plugin on the new files. Then reinserting the deleted files. But that will become too cumbersome in little time as you can imagine.