Hmm...I had an experience that reminds me of yours not too long ago, Bathsheba.
We were staying for a few nights in a house where the owner had passed away
in the house not too long before. His things were still all in the house as he'd left them, etc (sounds weird, but he was an acquaintance, and the person who was caring for the house is a friend, and we were stuck for a place to stay, so...). He was an avid musician, and down in the basement all of his musical equipment was still set up, including his drum kit.
Well, I had thought it might be weird to stay in a house someone had died in, but it wasn't bothering me, and we'd stayed the first night with no problem. However, the second night, I woke up about 3 am to the sound of a slow, rhythmic tattoo being played on the drums down in the basement.
I listened to it for several minutes, trying to convince myself it was something else, but I could even pick out the individual tones of the different drums; I could hear the snare, the bass, the toms... I woke my husband, made him listen. He pretended not to be nervous, but wouldn't go downstairs and see what it was, either (ha!)... The next morning we took turns going down in the basement and banging away on the drums while one of us stayed upstairs to listen and see if it was the same sound. It sounded
just the same. I was nearly convinced-- nothing else made noises like that, we checked everything, listened to the furnace and the water heater and the pipes. It happened again the next night; we laid awake and listened. I'd finally met a ghost!
But...
The third morning, while I was taking a shower, guess what? The drumming started again-- and it was the water heater. *heehee*
Man, was it convincing. Even when you
knew what it was and stood right there listening, it sounded like it was coming from the drums. So...you may want to double check on things like the furnace and the water heater before you start telling all your friends about your ghost