Q's latest drop leads to an article that highlights an HP lovecraft underground sort of thing. I find that odd that the octopus stuff is designated to underground stuff. Now it also talks about a sealed up archway which goes along with the brick stuff i noticed in the breweries.
http://sparechangenews.net/2015/07/bizarre-boston-the-secret-north-end-tunnels/
>Let them prosecute and persecute above ground – things went on every day that they couldn’t reach…”
another site has the same stuff
https://blog.dailyfreepress.com/2017/10/21/freep-unsolved-the-mystery-of-thomas-gruchys-north-end-tunnels/