ESTABLISHING THE ROOT CAUSE

I've been Blipsilent for days.  The incredible beauty of these misty mornings and the vividness of the autumn colour have overwhelmed me. I've seen such lovely and clever images here and so I just relaxed and left it to you. I think that's the root cause, but I haven't quite identified the solution. 

This was displayed on the wall where I taught tonight.  It was an industrial plant, but oddly it reminded me of my later years in education - shudder!