Temp Save of Edit Node Data?

Hi folks

I am wondering if Drupal has a 'secret' auto-save table that periodically saves what you are editing in a node.

The scenario is that I was taking notes from a presentation during the evening and typing them up directly into a page on a site. I had purposely saved the page at 2 intervals.

Then I continued on to flesh out what the speaker had said, hand-code the html to make it pretty (no WYSIWYG!) and it was all finished, albeit that I didn't realise that 3 hours had passed, when I pressed the 'Preview' button.

Of course I expected to see my handiwork but alas, the Server Connection Failed and so it asked me to "Try again' which unfortunately did not work, so I used the browser back button to see if what I was trying to preview was still there but it was not.

So I am hoping beyond hope that I can get back all that work more easily than spending another 3 hours when the information is now not fresh in my mind.

Is there any writing to the database that happens like an Auto-Save?

T.I,A.