Sue -
What you should try first in such cases is to click the 'Edit' button in
the folder from which the delete took place, and see whether 'Undo Delete'
is available. If it is, click it - and your folder should then reappear. You
can also apply 'Control+Z' (which is 'undo last operation') to achieve the
same effect.
If that fails, enter 'Pictures' as a search and see what comes up on the
list. It's quite possible that the folder has been accidentally moved into
another folder, which is why it's not in the Recycle bin (although from what
you wrote it looks like a bit of a forlorn hope).
Other posters are correct about putting personal data onto a separate
hard-drive - but it's not a germane comment in this case.
They're also right about not making any changes to that computer until
the files have been found. A program that I use for retrieving crashed
drives is GetDataBack - I can't remember, but I think that the evaluation
version might be sufficiently-featured to get your files back if they've
been trashed somehow. At the very least, it'll show you whether the folder
and files are still available. Use 'Sustained Damage' as the initial
setting. The program comes in two flavours - FAT and NTFS. The chances are
that you'll need the NTFS version.
Good luck - I hope you get your photos back
)
Regards,
Philip