Aperture Library missing from Drive
So, I have about a 240GB Aperture Library. I went to open Aperture today to set up a new vault, but Aperture said it could not find my library. I went to locate it on the appropriate drive, but alas, the entire library was missing. The drive is showing that 240 GB are still being used, but nothing is showing up.
Anyone have any idea how I may be able to find/recover my library from this drive?
Macbook, Mac OS X (10.5.5)