There are a couple of possibilities that occur to me. One is that
you've accidentally moved it elsewhere; try searching for it in the
Finder. Another is that somehow it got changed to invisible; do a
Finder search with the option of finding invisible files.
Just for curiousity, does Eudora still work? If it does, then you know
the folder is there somewhere and Eudora application knows where it is.
--
Kathy