I removed the leading slash to access the right directory, and there are lots of files in there, just not the ones I'm looking for.
I ended up finding them in a totally different location:
W:\Departmental\Facilitators\WIKI\Wiki Export HTML\espfacilitators\mainSpace\Files Organize by Dicipline\English\Courtney WS plans
This may mean that some of my staff were "helpfully" reorganizing things for me.
Thanks so much for the help guys.