Thanks, guys.
I have a copy of
Gnomes 100, Dragons 0 and the 'bookmarks' match the style. I was able to confirm they belong to
Faerie Mound of Dragonkind. Does me no good, as I don't have that. Into the trade pile they go, as if someone needed cut pieces.
The Simbalist map does seem like it would go with the plans books. One was described as holding four large plans. I wasn't able to find a pic to confirm that, though.