Accidentally deleted my Safari bookmarks - Mac help please!?

Late last night I emptied my cache and apparently deleted the wrong Safari files as I now have no bookmarks in Safari. Unfortunately, I had not saved the files to disk. I had tons of brilliant links saved and must have just been in the wrong folder when I deleted the files. Drat!
FYI, I did a "Secure Empty Trash" immediately afterwards and I'm running OS X 10.3.9 on an iMac G5. Is there any way to recover the bookmarks, or am I just plain out of luck?
For Accidentally deleted my Safari bookmarks - Mac help please!? try this:

• On the new OS X you could go go back using Time Machine
  
  http://www.apple.com/macosx/features/timemachine.html
  
  On 10.3 you can't - sorry!