Thief Side Mission: The Disappearing Poet

This is not a hard mission, just mildly annoying. For instance, one of the pieces of paper that you're looking for is under a bag of food. If you're at full health, and have a full inventory, you can't pick the food up.

All of the pieces are shown in the video that accompanies this post. The three that you're most likely to miss are the one under the food, the one on top of the bureau, and one hidden behind the lid of an open chest.

If you're stuck, just use focus to highlight anything that you can interact with in the area.