"Guys, Flux is a motion sensor. On one side it lights up green, which we usually interpret as "Yes", and on the other side it lights up red, which we understand as "No", – I explained to the camera.

"Kat, EDI", – Bridie pointed to the window that was closer to me. On its windowsill there was a small device with several types of multi-colored lights. I turned the camera there.

"Blue. Air pressure. Guys, this device records changes in various atmospheric parameters: pressure, humidity, temperature. Oh! And red too. The temperature has dropped. Listen", – I turned the camera to Bridie. – "Maybe I should move it from the window? After all, it has no glass, and the air temperature drops at night".

"Yes, you're right. Let me move it closer to you".

"No, there might be cool air coming from the door. Let me put it closer to the lights. See, guys? A lot can be explained by the wind, or the natural sounds of the building, for example. Well, we have ancient stones here, which means we can’t explain the strange sounds by the settling of the building. By the way, Bridie, did you come down the stairs about twenty minutes ago?"

"No, I was here the whole time. Why?"

"I heard someone’s footsteps coming from the stairs when we were sitting in the living room. I thought maybe it was you…"

"No, it definitely wasn’t me".

"I see…" – I said quietly and went to move the EDI.

When I approached the window, music started playing.

"Oops! Guys, it’s me. Don’t be scared!" – I smiled and moved away from the window. – "As you can see, the music box reacted to my phone. Now, most likely, the lights will go crazy too".

I placed the device in the center of the circle of lights, which, as I expected, all began to flicker at once.

"Look, huh? You've got all the devices going crazy! Look at the EDI – it's twinkling like a Christmas tree!" – Bridie scolded me jokingly.

"Uh… I didn't do that… EDI doesn't respond to radiation. But let me step back just in case".

I returned to my original position near the entrance, where O'Connell was standing quietly, leaning against the door with his arms crossed over his chest. He was watching us with a very serious face, as if he was waiting for something to happen.

I shook my head. Okay, I need to push these thoughts away.

"Kat, should we try the recorder?" – Bridie asked.

"Yeah, go ahead. Maybe we can catch something. When I came in here, I thought I heard something, like a whisper".

Out of the corner of my eye, I saw the manager turn his head sharply in my direction.

"Did you hear it too?" – I asked him.

"No… I didn't hear anything…" – he answered with genuine surprise in his voice.

Does he always hear what others hear? And did I hear what others didn't?..

"Maybe it was just a rustling sound, not a whisper", – I tried to calm him down (or myself?). – "Or the sound of the wind, or mice… Or a bird. Downstairs you said something about ravens".

"Yes, you may be right", – he said calmly. – "And the ravens’ nest in that wall over there on the left. There are several steps down leading to a small observation room".

Bridie and I looked towards that wall. There was indeed a rustling sound coming from there, and a moment later a huge black raven flew out. It flew across the room and landed in the window opening. It sat there for a few seconds, looking at us with an inquisitive gaze, and then suddenly took off and flew straight towards me, landing on my right shoulder.

I almost dropped the camera in surprise! But I quickly came to my senses and turned my head towards the bird.