Haunted hotel I work at in Scotland story

Hi guys I’m new here and just wanted to share my experience working in a haunted hotel in Scotland.

For context I work in a very well known hotel for being haunted. The original hotel was built around the mid 1600s so the building is of course very old. People in the local area and especially people who work there, like me know it’s haunted and there are many stories surrounding the grounds and I have many stories from staff over the years. A lot of the time I work until 1 or 2AM as I do closings, typically there is at least 2 of us on a close so I was not alone in the building during any of these encounters. This one occasion something was left behind in our venue room downstairs so my manager asked me to leave it at reception upstairs. I walked up stairs and through our corridor just a usual stroll around the property as there wasn’t much to be done anyone so was of course taking my time. I put the object by reception ( I honestly don’t remember what the object was) and heard foot steps from the room next door (our library). Thinking it could have been a guest from the event that night needing assistance of course went to go check on them. As I walked into the library of course no one was there. A little confused I assumed I was tired as it was around 1am at this point and chocked it up to my imagination. As I was checking a round the library area and connecting rooms to make sure no one was definitely looking for a member. For some context on the design of the hotel our library has 3 connecting rooms but one of them is blocked by wall and you can only access it through a door, This is the room I was in. As I was walking through this room ready to head back down stairs I heard footsteps again from the library area, silly me went to go check and in the corner of my eye as I was walking into this room I saw a black figure quickly disappear but I definitely saw something. A little shaken up I decided to just let it back to the events room and finish cleaning up where other people were. I decided not to say anything to anyone as I know plenty of people have had their encounters here, especially the nighttime staff as there here from late at night until around 7am and they said they’ve seen and heard things.
The building is of course very old so experiencing these things are normal for staff I did not feel unsafe or as if the figure was going to hurt me just a little shaken up by the experience. I haven’t experienced anything since as of right now but I am still currently working there so I can update if anything changes 🫣😅