Thanks, Allan. I think that answered my question. In that thread there was a reply from 'Allison' who stated:
My three sets (F 1002, F 1003 and F 1004) are in shrink, but open. So I think I have been able to figure out what is there.
There is one cover page - for example Set One : Basic Dungeon. On the reverse of this is a geomorph.
There are four other geomorph pages with nothing on the reverse.
There is a back page, the heading of which is Dungeon Level Geomorphs, and on the back of this is the Sample Level Matrix Key.