I have had an exchange of emails with my friend Russell, and also quite an agitated phone call. He sent me a video. He said it showed the face of Elizabethan mathematician/magican Dr John Dee in a can of paint.
For some reason the video played upside down on my computer so I couldn't see the face. There followed a phone call from Russell who had just come back from a school fete with Sachi and Mio - they visit events like this as prospective parents, to check whether the schools will be suitable for Mio. He said it was ridiculous that I couldn't see the face in the can of paint. He said that even Mio had looked at it and pointed and said, 'Face'. I said he should have taken the can of paint to the school fete and asked the other parents if they could see a face in it. I said he should have got irate if they said no.
He sent me another video.
I seemed to recognise the face so I posted this photo on Facebook hoping the face recognition software would suggest a name to tag it with, which it didn't. However, there was a thrilling development. My friend Serena said it looked like the fourth Dr Who, Tom Baker.
Conclusion: Evidence of time travel.