A Ruined Picnic can be obtained from a note located in the Winter Palace's Baths, after visiting the Elven Mountain Ruins.
Note text[]
Note: A Ruined Picnic
Quennel:
Now that you mention it, that elf hanging about the tavern does look familiar, but I can't imagine why she would have been at your cousin's wedding. Perhaps she was one of the servants attending Duke Verney after he slipped into the mud pond and onto that wasps' nest at the picnic? Maker, I'm still not sure how that happened.
Notes[]
- This note is not included in the Codex.