When I tell you what they had did in the fall of 2018 (before the British were sent) and who (with a string/catgut) they let inside the house on me, send them all straight to guillotine.
At least now I know who swept it under the rug.

This requires a thorough interrogation, all.

This looks like a hole was drilled through the wall from the apartment above. It wasn't there when I moved in. A few years ago, there was a noise like a drill and then plaster fell down from this very spot.

There is no coincidence.
There is a photo with the location marked in the comments.

Interesting🤔..., shortly after I sent this post, it suddenly feels better to breathe here.

...so carbon monoxide?
dull headache
weakness
nausea
feeling like vomiting
confusion
dizziness
difficulty breathing
strange taste in the mouth
At night I sometimes felt like I was going to faint.