Okay, I figured it out. For others with this problem, here is what happened:
Several writers have access to the blog I work in. In order to sign their entries, each writer has his own user name.
I have a user identity as well that allows my entries to be slugged with my full name, instead of "Administrator." I work in Dashboard, though, as the administrator, which gives me the ability to sign the article with any user's name. I had already signed the entry I was working on with my own name.
Somehow, instead of clicking on the "Save and keep editing" button, I clicked on the box, which indicated the piece was Private. (It's right under "Draft") Once that happened I could no longer see the piece authored by my user name, because I was in Dashboard as an administrator.
I had to log out as Administrator, log in as my user name and then the Private Post under my name was available to me. I unchecked the Private box, and the piece was restored.
It was a crazy half-hour. But it had a happy ending. Good luck to all who are in similar salvage situations.