Jiub's Opus (Page 1) is a quest item in Skyrim: Dawnguard. It is needed to complete Impatience of a Saint
Location[edit]
Cross main wall facing south. Then turn left (face east) follow wall until you find stairs. Climb the stairs and Jiub's Opus page #1 is right next to some spirit standing there.[1]
Visual Help/Screenshot[edit]
These are the stairs leading to Jiubs Opus Page 1: