Historical behaviour

Mmmm... So, acting on numerous readers' requests I fired up the old time portal to try to grab a few more glimpses from our future.  But regular 'readers' of this blog will know that my time machine is about as effective and reliable as everything else I possess and this time it seems to have veered off into the past.  The dial flicked between the 1930s and the nineteenth century, before breaking off and rolling into a corner of the cellar where my chain isn't long enough to reach, so I'm afraid I have no idea when these originated.

I have a feeling this has happened before, though.  Long, long ago....