The Communal Journal can be obtained in the Crossroads, from a book found next to the eluvian that leads to the Shattered Library.
Note text[]

Note: Communal Journal
This slim journal was tucked into a bookshelf in the Crossroads, as if left for someone to find. Each entry is in a different hand:
I've dropped rocks off a dozen ledges. I've not heard one hit bottom.
This place has no bottom. Do not be here if you have no tasks here.
An entry in Qunlat follows:
"Emmet" missed his rendezvous. He said he was scouting the lower ledges on orders.
Another entry in Qunlat follows:
Understood. No one's to go near that mirror.
Notes[]
- This note is not included in the Codex.