Hi all-
After ducks made his first reply I went back and took another look. Let me explain what I was doing.
My wife has been keeping a record of the books she has read; so that she doesn't acquire books she has already read. She created a text file by author. I sorted it with PSPad and converted it to epub via Calibre. This gave me one file with many lines (about 300 authors and 2,000 books). I started down the list putting the cursor in front of he author and clicking h3. I got to somewhere between 60 and 65 when it refused to to go any further. After trying retyping and hand coding etc. I gave op and sent the original message. Thats history.
The project is now finished and is alive and well on a Sony PRS-350.
I started with a fresh epub file and first broke it up into the A-B's C-D's etc. I then assigned the appropriate h2 title and and proceeded as above. When I was done the largest page had 46 authors. (books don't count

)
I still have the file that was giving me problems so I might go back and see if there is a limit or here was something wrong with the file. Right now the wife is happy - therefore so am I.
I want to thank all for the help!
Regards - John
P.S. Now the wife wants her address book on her Sony. Maybe I'll find time for some of my projects one of these days.