Hidden in the Walls!

Our master bedroom features a sitting room that is separated by a pair of pocket doors. The doors have been taped shut since we bought the place. Tonight I decided to remove the tape!!! That might be a little dramatic, but it was a little suspenseful since we don't really know why they were taped up to begin with. What secrets might they hold??? Some thoughts are:

Bees! We had a bee infestation and it is thought they might have found their way through the ceiling joints and into the room.

Energy - Perhaps these doors allow lots of cold air in from the unheated wall cavity.

Bats! - We get several bats in the house each year. Maybe they find their way in from here...

Removing the grey duct tape turned out to be a pain. It has dried out and will need manual scraping to remove. I tried adhesive remover but it wouldn't reactivate the glue. I guess I will add that to my project list. Funny how everything with this house is complicated, lol.

Here are some pictures with captions.