Puzzling Pictures 9: At The End Of The Day

It had been a long day, but there was still one more job to tackle. It’s something that I like to do a couple of times a year, although I suppose most people don’t bother any more. It’s gone the way of donkey stoning the front step and possing the washing in a dolly tub. It certainly baffled my neighbour, who seemed to think it was some sort of arcane magical practice, or preparation for an arson attack on her property. 

There is a more mundane explanation, of course. 

What do you think I was up to on the back street?

To be continued.