Puzzle and Pen

I was just starting to put my puzzle together when Mom and Dad came into the living room and said we’re going for a ride, and so I left the puzzle lay there.  It was all taken apart.   It was one of those ones that had the cardboard frame around it, and underneath it; the puzzle pieces all fit within the one frame.  

We came home, later on, and again I started putting it together – now startled in seeing what had happened.  Someone had taken a blue ball-point pen and drew outlines where the puzzle pieces went.  I couldn’t imagine who had been there without us; the doors were always locked, and there was just the three of us.
  
The mystery of the puzzle and pen has always been there.    I thought it was a ghost; that’s how my mind accepted it.   Shortly after that, I started hearing noises in the attic, much like footsteps.

Late one night as I was laying there and reading under the lamp with my bedroom door a bit open.  I heard the attic steps open and someone, or some thing, descend them.  I was frozen in time, as the steps were slowly being pulled down in the hallway, and in seeing shadows of the movements, and then a shadowy figure walked past my bedroom.  The footsteps were soft and shallow.  I heard the front door open, and he left.   I wondered a minute.   The puzzle was just some animal; probably a tiger or something.