Skyrim: Jiub's Opus Page 7
To find Jiubs Opus page #7, go south from where you took the teleporter to fight the keepers. Or go east from where you found Jiub's Opus Page 4. Go east past a soul well with some souls around it towards a small structure, then climb some stairs and find the page near a pedestal.
 Visual Help/Screenshots
This is how the house with the pedestal on top looks. Climb the stairs there to find the page you need.