There was nothing in the room at all as it was the same as before. None of the objects in the room was a move at all and there certainly doesn't have any object that could make the sound that we both been hearing before when guarding this room.
"As I said, there is indeed nothing here even though you're hearing the sound coming from here." Captain Neir said that with Vicar as he proves that there was nothing here.
"I guess you're right... but the mysterious sound does come from here." Vicar said that as we both did hear it and certain that it coming from this room.
"It's not that I didn't trust you but it would be hard for you to know what exactly made the sound that you have heard before." Captain Neir said.