A Likely Story....

This is a true story about ghosts. I think that is what I am seeing. I don't really know what it is so if anyone reading this has some insight it would be nice to hear it.
Several years ago Heinrich and I were in Kingston for a week. We had gone to Fort Henry only to find it closed but we could wander the grounds if we wished. While we were passing a wall with a cannon poking through it I saw a shimmer standing beside the cannon about two feet off the ground with an oval shape to it. I stood there looking at it for at least a minute then called to Heinrich to come see what I was seeing. Of course when I turned to look at it again it wasn't there.
Last summer I started seeing these shapes in the cedar hedge at the back of the garden. I thought it was my glasses reflecting something but they were still there with or with out glasses. These were smaller shimmers but several. They came and went all afternoon.
Yesterday while shopping there was a shimmer standing two feet off the ground in front of Staples. I watched it for a good five minutes then when I turned to talk to Heinrich and looked back it was gone.
There is also that awful smell of cigarette smoke that comes up very strongly in the kitchen now and again. As though someone was sitting at the table having a relaxing cig and waiting to chat.
This is an old house and there have been many strange things happen in it. Just ask the younger offspring and they will tell you, but that belongs to the house .
Who or what the shimmers belong to is the question. At least for me. I have theories but I just don't know!