Well Stacy, thank you. It seems that something happened to the category itself. I added a new category and made all of my existing portfolio pages part of it and voilà! All of the page content reappeared!
Thanks for leading me down the right path!
Kim
It is a portfolio page. They do have categories checked. This happened right after I updated WordPress… but I also did a few other things.
I can’t seem to make it right again!