Mosaic

– Computer still not working?
– No. As you can see.
– You ought to get it fixed.
– Yes.
– Or get another one.
– Thank you. You have been a great help.
– Sometimes it takes someone on the outside to cast light on a thorny problem: sometimes you can be just too close to see the solution.
– Indeed. That has made everything so much clearer. It's not that I want to change the subject, but look at this:

– Interesting picture. What is it?
– I don't really know. It was on a stone.
– Some kind of primitive art? A relic of a long-forgotten civilisation?
– Perhaps.
– Where did you find it?
– Macclesfield.
– Well, there you go, then.